Merge branch 'main' into web-client-oauth-proxy-fetch

This commit is contained in:
Cliff Hall 2026-03-18 18:41:05 -04:00 • committed by GitHub
commit 26c9f60d43
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GPG key ID: B5690EEEBB952194
39 changed files with 4329 additions and 358 deletions

6
.github/dependabot.yml vendored Normal file
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@ -0,0 +1,6 @@
version: 2
updates:
- package-ecosystem: "github-actions"
directory: "/"
schedule:
interval: "weekly"

View file

@ -33,7 +33,7 @@ jobs:
github.event_name == 'pull_request_review_comment' ||
github.event_name == 'pull_request_review'
id: pr
uses: actions/github-script@v7
uses: actions/github-script@v8
with:
script: |
let prNumber;
@ -54,7 +54,7 @@ jobs:
- name: Checkout PR branch
if: steps.pr.outcome == 'success'
uses: actions/checkout@v4
uses: actions/checkout@v6
with:
ref: ${{ steps.pr.outputs.sha }}
repository: ${{ steps.pr.outputs.repo }}
@ -62,7 +62,7 @@ jobs:
- name: Checkout repository
if: steps.pr.outcome != 'success'
uses: actions/checkout@v4
uses: actions/checkout@v6
with:
fetch-depth: 0

View file

@ -15,10 +15,10 @@ jobs:
run:
working-directory: ./cli
steps:
- uses: actions/checkout@v4
- uses: actions/checkout@v6
- name: Set up Node.js
uses: actions/setup-node@v4
uses: actions/setup-node@v6
with:
node-version-file: package.json
cache: npm

View file

@ -18,9 +18,9 @@ jobs:
sudo apt-get update
sudo apt-get install -y libwoff1
- uses: actions/checkout@v4
- uses: actions/checkout@v6
- uses: actions/setup-node@v4
- uses: actions/setup-node@v6
id: setup_node
with:
node-version-file: package.json
@ -29,7 +29,7 @@ jobs:
# Cache Playwright browsers
- name: Cache Playwright browsers
id: cache-playwright
uses: actions/cache@v4
uses: actions/cache@v5
with:
path: ~/.cache/ms-playwright # The default Playwright cache path
key: ${{ runner.os }}-playwright-${{ hashFiles('package-lock.json') }} # Cache key based on OS and package-lock.json
@ -51,7 +51,7 @@ jobs:
run: npm run test:e2e
- name: Upload Playwright Report and Screenshots
uses: actions/upload-artifact@v4
uses: actions/upload-artifact@v6
if: steps.playwright-tests.conclusion != 'skipped'
with:
name: playwright-report

View file

@ -12,12 +12,12 @@ jobs:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- uses: actions/checkout@v6
- name: Check formatting
run: npx prettier --check .
- uses: actions/setup-node@v4
- uses: actions/setup-node@v6
with:
node-version-file: package.json
cache: npm
@ -50,8 +50,8 @@ jobs:
id-token: write
steps:
- uses: actions/checkout@v4
- uses: actions/setup-node@v4
- uses: actions/checkout@v6
- uses: actions/setup-node@v6
with:
node-version-file: package.json
cache: npm
@ -77,7 +77,7 @@ jobs:
attestations: write
id-token: write
steps:
- uses: actions/checkout@v4
- uses: actions/checkout@v6
- name: Log in to the Container registry
uses: docker/login-action@v3
@ -109,7 +109,7 @@ jobs:
labels: ${{ steps.meta.outputs.labels }}
- name: Generate artifact attestation
uses: actions/attest-build-provenance@v2
uses: actions/attest-build-provenance@v3
with:
subject-name: ghcr.io/${{ github.repository }}
subject-digest: ${{ steps.push.outputs.digest }}

View file

@ -1,14 +1,21 @@
# Security Policy
Thank you for helping us keep the inspector secure.
Thank you for helping keep the Model Context Protocol and its ecosystem secure.
## Reporting Security Issues
This project is maintained by [Anthropic](https://www.anthropic.com/) as part of the Model Context Protocol project.
If you discover a security vulnerability in this repository, please report it through
the [GitHub Security Advisory process](https://docs.github.com/en/code-security/security-advisories/guidance-on-reporting-and-writing-information-about-vulnerabilities/privately-reporting-a-security-vulnerability)
for this repository.
The security of our systems and user data is Anthropic’s top priority. We appreciate the work of security researchers acting in good faith in identifying and reporting potential vulnerabilities.
Please **do not** report security vulnerabilities through public GitHub issues, discussions,
or pull requests.
Our security program is managed on HackerOne and we ask that any validated vulnerability in this functionality be reported through their [submission form](https://hackerone.com/anthropic-vdp/reports/new?type=team&report_type=vulnerability).
## What to Include
## Vulnerability Disclosure Program
To help us triage and respond quickly, please include:
Our Vulnerability Program Guidelines are defined on our [HackerOne program page](https://hackerone.com/anthropic-vdp).
- A description of the vulnerability
- Steps to reproduce the issue
- The potential impact
- Any suggested fixes (optional)

216
cli/LICENSE Normal file
View file

@ -0,0 +1,216 @@
The MCP project is undergoing a licensing transition from the MIT License to the Apache License, Version 2.0 ("Apache-2.0"). All new code and specification contributions to the project are licensed under Apache-2.0. Documentation contributions (excluding specifications) are licensed under CC-BY-4.0.
Contributions for which relicensing consent has been obtained are licensed under Apache-2.0. Contributions made by authors who originally licensed their work under the MIT License and who have not yet granted explicit permission to relicense remain licensed under the MIT License.
No rights beyond those granted by the applicable original license are conveyed for such contributions.
---
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to the Licensor for inclusion in the Work by the copyright
owner or by an individual or Legal Entity authorized to submit on behalf
of the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
---
MIT License
Copyright (c) 2024-2025 Model Context Protocol a Series of LF Projects, LLC.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
---
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Documentation in this project (excluding specifications) is licensed under
CC-BY-4.0. See https://creativecommons.org/licenses/by/4.0/legalcode for
the full license text.

View file

@ -1,18 +1,30 @@
import { expect } from "vitest";
import type { CliResult } from "./cli-runner.js";
function formatCliOutput(result: CliResult): string {
const out = result.stdout?.trim() || "(empty)";
const err = result.stderr?.trim() || "(empty)";
return `stdout: ${out}\nstderr: ${err}`;
}
/**
* Assert that CLI command succeeded (exit code 0)
*/
export function expectCliSuccess(result: CliResult) {
expect(result.exitCode).toBe(0);
expect(
result.exitCode,
`CLI exited with code ${result.exitCode}. ${formatCliOutput(result)}`,
).toBe(0);
}
/**
* Assert that CLI command failed (non-zero exit code)
*/
export function expectCliFailure(result: CliResult) {
expect(result.exitCode).not.toBe(0);
expect(
result.exitCode,
`CLI unexpectedly exited with code ${result.exitCode}. ${formatCliOutput(result)}`,
).not.toBe(0);
}
/**

View file

@ -1,7 +1,7 @@
import fs from "fs";
import path from "path";
import os from "os";
import crypto from "crypto";
import * as fs from "fs";
import * as path from "path";
import * as os from "os";
import * as crypto from "crypto";
import { getTestMcpServerCommand } from "./test-server-stdio.js";
/**

View file

@ -6,6 +6,7 @@ import type { Request, Response } from "express";
import express from "express";
import { createServer as createHttpServer, Server as HttpServer } from "http";
import { createServer as createNetServer } from "net";
import { randomUUID } from "crypto";
import * as z from "zod/v4";
import type { ServerConfig } from "./test-fixtures.js";
@ -187,22 +188,24 @@ export class TestServerHttp {
}
/**
* Start the server with the specified transport
* Start the server with the specified transport.
* When requestedPort is omitted, uses port 0 so the OS assigns a unique port (avoids EADDRINUSE when tests run in parallel).
*/
async start(
transport: "http" | "sse",
requestedPort?: number,
): Promise<number> {
const port = requestedPort
? await findAvailablePort(requestedPort)
: await findAvailablePort(transport === "http" ? 3001 : 3000);
this.url = `http://localhost:${port}`;
const port =
requestedPort !== undefined ? await findAvailablePort(requestedPort) : 0;
if (transport === "http") {
return this.startHttp(port);
const actualPort = await this.startHttp(port);
this.url = `http://localhost:${actualPort}`;
return actualPort;
} else {
return this.startSse(port);
const actualPort = await this.startSse(port);
this.url = `http://localhost:${actualPort}`;
return actualPort;
}
}
@ -213,8 +216,10 @@ export class TestServerHttp {
// Create HTTP server
this.httpServer = createHttpServer(app);
// Create StreamableHTTP transport
this.transport = new StreamableHTTPServerTransport({});
// Create StreamableHTTP transport (stateful so it can handle multiple requests per session)
this.transport = new StreamableHTTPServerTransport({
sessionIdGenerator: () => randomUUID(),
});
// Set up Express route to handle MCP requests
app.post("/mcp", async (req: Request, res: Response) => {
@ -292,10 +297,12 @@ export class TestServerHttp {
// Connect transport to server
await this.mcpServer.connect(this.transport);
// Start listening
// Start listening (port 0 = OS assigns a unique port)
return new Promise((resolve, reject) => {
this.httpServer!.listen(port, () => {
resolve(port);
const assignedPort = (this.httpServer!.address() as { port: number })
?.port;
resolve(assignedPort ?? port);
});
this.httpServer!.on("error", reject);
});
@ -371,10 +378,12 @@ export class TestServerHttp {
// Note: SSE transport is created per request, so we don't store a single instance
this.transport = undefined;
// Start listening
// Start listening (port 0 = OS assigns a unique port)
return new Promise((resolve, reject) => {
this.httpServer!.listen(port, () => {
resolve(port);
const assignedPort = (this.httpServer!.address() as { port: number })
?.port;
resolve(assignedPort ?? port);
});
this.httpServer!.on("error", reject);
});

View file

@ -1,6 +1,6 @@
{
"name": "@modelcontextprotocol/inspector-cli",
"version": "0.19.0",
"version": "0.21.1",
"description": "CLI for the Model Context Protocol inspector",
"license": "SEE LICENSE IN LICENSE",
"author": "Model Context Protocol a Series of LF Projects, LLC.",
@ -12,7 +12,8 @@
"mcp-inspector-cli": "build/cli.js"
},
"files": [
"build"
"build",
"LICENSE"
],
"scripts": {
"build": "tsc",
@ -25,7 +26,7 @@
"test:cli-metadata": "vitest run metadata.test.ts"
},
"devDependencies": {
"@types/express": "^5.0.6",
"@types/express": "^5.0.0",
"tsx": "^4.7.0",
"vitest": "^4.0.17"
},

216
client/LICENSE Normal file
View file

@ -0,0 +1,216 @@
The MCP project is undergoing a licensing transition from the MIT License to the Apache License, Version 2.0 ("Apache-2.0"). All new code and specification contributions to the project are licensed under Apache-2.0. Documentation contributions (excluding specifications) are licensed under CC-BY-4.0.
Contributions for which relicensing consent has been obtained are licensed under Apache-2.0. Contributions made by authors who originally licensed their work under the MIT License and who have not yet granted explicit permission to relicense remain licensed under the MIT License.
No rights beyond those granted by the applicable original license are conveyed for such contributions.
---
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to the Licensor for inclusion in the Work by the copyright
owner or by an individual or Legal Entity authorized to submit on behalf
of the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
---
MIT License
Copyright (c) 2024-2025 Model Context Protocol a Series of LF Projects, LLC.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
---
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Documentation in this project (excluding specifications) is licensed under
CC-BY-4.0. See https://creativecommons.org/licenses/by/4.0/legalcode for
the full license text.

View file

@ -13,8 +13,15 @@ module.exports = {
tsconfig: "tsconfig.jest.json",
},
],
"^.+\\.m?js$": [
"ts-jest",
{
tsconfig: "tsconfig.jest.json",
},
],
},
extensionsToTreatAsEsm: [".ts", ".tsx"],
transformIgnorePatterns: ["node_modules/(?!(@modelcontextprotocol)/)"],
testRegex: "(/__tests__/.*|(\\.|/)(test|spec))\\.(jsx?|tsx?)$",
// Exclude directories and files that don't need to be tested
testPathIgnorePatterns: [

View file

@ -1,6 +1,6 @@
{
"name": "@modelcontextprotocol/inspector-client",
"version": "0.19.0",
"version": "0.21.1",
"description": "Client-side application for the Model Context Protocol inspector",
"license": "SEE LICENSE IN LICENSE",
"author": "Model Context Protocol a Series of LF Projects, LLC.",
@ -12,7 +12,8 @@
},
"files": [
"bin",
"dist"
"dist",
"LICENSE"
],
"scripts": {
"dev": "vite --port 6274",
@ -25,6 +26,8 @@
"cleanup:e2e": "node e2e/global-teardown.js"
},
"dependencies": {
"@mcp-ui/client": "^6.0.0",
"@modelcontextprotocol/ext-apps": "^1.0.0",
"@modelcontextprotocol/sdk": "^1.25.2",
"@radix-ui/react-checkbox": "^1.1.4",
"@radix-ui/react-dialog": "^1.1.3",

View file

@ -30,6 +30,7 @@ import {
hasValidMetaPrefix,
isReservedMetaKey,
} from "@/utils/metaUtils";
import { getToolUiResourceUri } from "@modelcontextprotocol/ext-apps/app-bridge";
import { AuthDebuggerState, EMPTY_DEBUGGER_STATE } from "./lib/auth-types";
import { OAuthStateMachine } from "./lib/oauth-state-machine";
import { createProxyFetch } from "./lib/proxyFetch";
@ -52,6 +53,7 @@ import {
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
import { Button } from "@/components/ui/button";
import {
AppWindow,
Bell,
Files,
FolderTree,
@ -76,6 +78,7 @@ import SamplingTab, { PendingRequest } from "./components/SamplingTab";
import Sidebar from "./components/Sidebar";
import ToolsTab from "./components/ToolsTab";
import TasksTab from "./components/TasksTab";
import AppsTab from "./components/AppsTab";
import { InspectorConfig } from "./lib/configurationTypes";
import {
getMCPProxyAddress,
@ -100,6 +103,27 @@ import MetadataTab from "./components/MetadataTab";
const CONFIG_LOCAL_STORAGE_KEY = "inspectorConfig_v1";
type PrefilledAppsToolCall = {
id: number;
toolName: string;
params: Record<string, unknown>;
result: CompatibilityCallToolResult;
};
const hasAppResourceUri = (tool: Tool): boolean => {
return Boolean(getToolUiResourceUri(tool));
};
const cloneToolParams = (
source: Record<string, unknown>,
): Record<string, unknown> => {
try {
return structuredClone(source);
} catch {
return { ...source };
}
};
const filterReservedMetadata = (
metadata: Record<string, string>,
): Record<string, string> => {
@ -127,12 +151,17 @@ const App = () => {
const [resourceContentMap, setResourceContentMap] = useState<
Record<string, string>
>({});
const [fetchingResources, setFetchingResources] = useState<Set<string>>(
new Set(),
);
const [prompts, setPrompts] = useState<Prompt[]>([]);
const [promptContent, setPromptContent] = useState<string>("");
const [tools, setTools] = useState<Tool[]>([]);
const [tasks, setTasks] = useState<Task[]>([]);
const [toolResult, setToolResult] =
useState<CompatibilityCallToolResult | null>(null);
const [prefilledAppsToolCall, setPrefilledAppsToolCall] =
useState<PrefilledAppsToolCall | null>(null);
const [errors, setErrors] = useState<Record<string, string | null>>({
resources: null,
prompts: null,
@ -287,6 +316,7 @@ const App = () => {
const [nextToolCursor, setNextToolCursor] = useState<string | undefined>();
const [nextTaskCursor, setNextTaskCursor] = useState<string | undefined>();
const progressTokenRef = useRef(0);
const prefilledAppsToolCallIdRef = useRef(0);
const [activeTab, setActiveTab] = useState<string>(() => {
const hash = window.location.hash.slice(1);
@ -309,11 +339,13 @@ const App = () => {
...(serverCapabilities?.prompts ? ["prompts"] : []),
...(serverCapabilities?.tools ? ["tools"] : []),
...(serverCapabilities?.tasks ? ["tasks"] : []),
"apps",
"ping",
"sampling",
"elicitations",
"roots",
"auth",
"metadata",
];
if (!validTabs.includes(originatingTab)) return;
@ -441,11 +473,13 @@ const App = () => {
...(serverCapabilities?.prompts ? ["prompts"] : []),
...(serverCapabilities?.tools ? ["tools"] : []),
...(serverCapabilities?.tasks ? ["tasks"] : []),
"apps",
"ping",
"sampling",
"elicitations",
"roots",
"auth",
"metadata",
];
const isValidTab = validTabs.includes(hash);
@ -474,6 +508,13 @@ const App = () => {
// eslint-disable-next-line react-hooks/exhaustive-deps
}, [mcpClient, activeTab]);
useEffect(() => {
if (mcpClient && activeTab === "apps" && serverCapabilities?.tools) {
void listTools();
}
// eslint-disable-next-line react-hooks/exhaustive-deps
}, [mcpClient, activeTab, serverCapabilities?.tools]);
useEffect(() => {
localStorage.setItem("lastCommand", command);
}, [command]);
@ -766,11 +807,13 @@ const App = () => {
...(serverCapabilities?.prompts ? ["prompts"] : []),
...(serverCapabilities?.tools ? ["tools"] : []),
...(serverCapabilities?.tasks ? ["tasks"] : []),
"apps",
"ping",
"sampling",
"elicitations",
"roots",
"auth",
"metadata",
];
if (validTabs.includes(originatingTab)) {
@ -860,22 +903,48 @@ const App = () => {
};
const readResource = async (uri: string) => {
if (fetchingResources.has(uri) || resourceContentMap[uri]) {
return;
}
console.log("[App] Reading resource:", uri);
setFetchingResources((prev) => new Set(prev).add(uri));
lastToolCallOriginTabRef.current = currentTabRef.current;
const response = await sendMCPRequest(
{
method: "resources/read" as const,
params: { uri },
},
ReadResourceResultSchema,
"resources",
);
const content = JSON.stringify(response, null, 2);
setResourceContent(content);
setResourceContentMap((prev) => ({
...prev,
[uri]: content,
}));
try {
const response = await sendMCPRequest(
{
method: "resources/read" as const,
params: { uri },
},
ReadResourceResultSchema,
"resources",
);
console.log("[App] Resource read response:", {
uri,
responseLength: JSON.stringify(response).length,
hasContents: !!(response as { contents?: unknown[] }).contents,
});
const content = JSON.stringify(response, null, 2);
setResourceContent(content);
setResourceContentMap((prev) => ({
...prev,
[uri]: content,
}));
} catch (error) {
console.error(`[App] Failed to read resource ${uri}:`, error);
const errorString = (error as Error).message ?? String(error);
setResourceContentMap((prev) => ({
...prev,
[uri]: JSON.stringify({ error: errorString }),
}));
} finally {
setFetchingResources((prev) => {
const next = new Set(prev);
next.delete(uri);
return next;
});
}
};
const subscribeToResource = async (uri: string) => {
@ -942,7 +1011,7 @@ const App = () => {
params: Record<string, unknown>,
toolMetadata?: Record<string, unknown>,
runAsTask?: boolean,
) => {
): Promise<CompatibilityCallToolResult> => {
lastToolCallOriginTabRef.current = currentTabRef.current;
try {
@ -1010,7 +1079,7 @@ const App = () => {
"_meta" in (response as Record<string, unknown>)
? ((response as { _meta?: Record<string, unknown> })._meta ?? {})
: undefined;
setToolResult({
let latestToolResult: CompatibilityCallToolResult = {
content: [
{
type: "text",
@ -1021,7 +1090,8 @@ const App = () => {
...(initialResponseMeta || {}),
"io.modelcontextprotocol/related-task": { taskId },
},
} as CompatibilityCallToolResult);
};
setToolResult(latestToolResult);
// Polling loop
let taskCompleted = false;
@ -1058,12 +1128,13 @@ const App = () => {
CompatibilityCallToolResultSchema,
);
console.log(`Result received for task ${taskId}:`, result);
setToolResult(result as CompatibilityCallToolResult);
latestToolResult = result as CompatibilityCallToolResult;
setToolResult(latestToolResult);
// Refresh tasks list to show completed state
void listTasks();
} else {
setToolResult({
latestToolResult = {
content: [
{
type: "text",
@ -1071,7 +1142,8 @@ const App = () => {
},
],
isError: true,
});
};
setToolResult(latestToolResult);
// Refresh tasks list to show failed/cancelled state
void listTasks();
}
@ -1085,7 +1157,7 @@ const App = () => {
? ((response as { _meta?: Record<string, unknown> })._meta ??
{})
: undefined;
setToolResult({
latestToolResult = {
content: [
{
type: "text",
@ -1096,13 +1168,14 @@ const App = () => {
...(pollingResponseMeta || {}),
"io.modelcontextprotocol/related-task": { taskId },
},
} as CompatibilityCallToolResult);
};
setToolResult(latestToolResult);
// Refresh tasks list to show progress
void listTasks();
}
} catch (pollingError) {
console.error("Error polling task status:", pollingError);
setToolResult({
latestToolResult = {
content: [
{
type: "text",
@ -1110,16 +1183,22 @@ const App = () => {
},
],
isError: true,
});
};
setToolResult(latestToolResult);
taskCompleted = true;
}
}
setIsPollingTask(false);
// Clear any validation errors since tool execution completed
setErrors((prev) => ({ ...prev, tools: null }));
return latestToolResult;
} else {
setToolResult(response as CompatibilityCallToolResult);
const directResult = response as CompatibilityCallToolResult;
setToolResult(directResult);
// Clear any validation errors since tool execution completed
setErrors((prev) => ({ ...prev, tools: null }));
return directResult;
}
// Clear any validation errors since tool execution completed
setErrors((prev) => ({ ...prev, tools: null }));
} catch (e) {
const toolResult: CompatibilityCallToolResult = {
content: [
@ -1133,6 +1212,7 @@ const App = () => {
setToolResult(toolResult);
// Clear validation errors - tool execution errors are shown in ToolResults
setErrors((prev) => ({ ...prev, tools: null }));
return toolResult;
}
};
@ -1319,6 +1399,10 @@ const App = () => {
<ListTodo className="w-4 h-4 mr-2" />
Tasks
</TabsTrigger>
<TabsTrigger value="apps">
<AppWindow className="w-4 h-4 mr-2" />
Apps
</TabsTrigger>
<TabsTrigger value="ping">
<Bell className="w-4 h-4 mr-2" />
Ping
@ -1453,6 +1537,9 @@ const App = () => {
error={errors.prompts}
/>
<ToolsTab
serverSupportsTaskRequests={
!!serverCapabilities?.tasks?.requests?.tools?.call
}
tools={tools}
listTools={() => {
clearError("tools");
@ -1471,7 +1558,26 @@ const App = () => {
) => {
clearError("tools");
setToolResult(null);
await callTool(name, params, metadata, runAsTask);
const result = await callTool(
name,
params,
metadata,
runAsTask,
);
const calledTool = tools.find(
(tool) => tool.name === name,
);
if (calledTool && hasAppResourceUri(calledTool)) {
setPrefilledAppsToolCall({
id: ++prefilledAppsToolCallIdRef.current,
toolName: name,
params: cloneToolParams(params),
result,
});
} else {
setPrefilledAppsToolCall(null);
}
return result;
}}
selectedTool={selectedTool}
setSelectedTool={(tool) => {
@ -1508,6 +1614,35 @@ const App = () => {
error={errors.tasks}
nextCursor={nextTaskCursor}
/>
<AppsTab
sandboxPath={`${getMCPProxyAddress(config)}/sandbox`}
tools={tools}
listTools={() => {
clearError("tools");
listTools();
}}
callTool={async (
name: string,
params: Record<string, unknown>,
metadata?: Record<string, unknown>,
runAsTask?: boolean,
) => {
clearError("tools");
setToolResult(null);
return callTool(name, params, metadata, runAsTask);
}}
prefilledToolCall={prefilledAppsToolCall}
onPrefilledToolCallConsumed={(callId) => {
setPrefilledAppsToolCall((prev) =>
prev?.id === callId ? null : prev,
);
}}
error={errors.tools}
mcpClient={mcpClient}
onNotification={(notification) => {
setNotifications((prev) => [...prev, notification]);
}}
/>
<ConsoleTab />
<PingTab
onPingClick={() => {

View file

@ -0,0 +1,284 @@
import { fireEvent, render, screen, waitFor } from "@testing-library/react";
import "@testing-library/jest-dom";
import App from "../App";
import { useConnection } from "../lib/hooks/useConnection";
import type { Client } from "@modelcontextprotocol/sdk/client/index.js";
type ToolListEntry = {
name: string;
inputSchema: {
type: "object";
properties: Record<string, unknown>;
};
_meta: Record<string, unknown>;
};
type AppsTabProps = {
tools: ToolListEntry[];
prefilledToolCall?: {
id: number;
toolName: string;
params: Record<string, unknown>;
result: {
content: Array<{ type: string; text: string }>;
};
} | null;
onPrefilledToolCallConsumed?: (callId: number) => void;
};
// Mock auth dependencies first
jest.mock("@modelcontextprotocol/sdk/client/auth.js", () => ({
auth: jest.fn(),
}));
jest.mock("../lib/oauth-state-machine", () => ({
OAuthStateMachine: jest.fn(),
}));
jest.mock("../lib/auth", () => ({
InspectorOAuthClientProvider: jest.fn().mockImplementation(() => ({
tokens: jest.fn().mockResolvedValue(null),
clear: jest.fn(),
})),
DebugInspectorOAuthClientProvider: jest.fn(),
}));
jest.mock("../utils/configUtils", () => ({
...jest.requireActual("../utils/configUtils"),
getMCPProxyAddress: jest.fn(() => "http://localhost:6277"),
getMCPProxyAuthToken: jest.fn(() => ({
token: "",
header: "X-MCP-Proxy-Auth",
})),
getInitialTransportType: jest.fn(() => "stdio"),
getInitialSseUrl: jest.fn(() => "http://localhost:3001/sse"),
getInitialCommand: jest.fn(() => "mcp-server-everything"),
getInitialArgs: jest.fn(() => ""),
initializeInspectorConfig: jest.fn(() => ({})),
saveInspectorConfig: jest.fn(),
}));
jest.mock("../lib/hooks/useDraggablePane", () => ({
useDraggablePane: () => ({
height: 300,
handleDragStart: jest.fn(),
}),
useDraggableSidebar: () => ({
width: 320,
isDragging: false,
handleDragStart: jest.fn(),
}),
}));
jest.mock("../components/Sidebar", () => ({
__esModule: true,
default: () => <div>Sidebar</div>,
}));
jest.mock("../components/ResourcesTab", () => ({
__esModule: true,
default: () => <div>ResourcesTab</div>,
}));
jest.mock("../components/PromptsTab", () => ({
__esModule: true,
default: () => <div>PromptsTab</div>,
}));
jest.mock("../components/TasksTab", () => ({
__esModule: true,
default: () => <div>TasksTab</div>,
}));
jest.mock("../components/ConsoleTab", () => ({
__esModule: true,
default: () => <div>ConsoleTab</div>,
}));
jest.mock("../components/PingTab", () => ({
__esModule: true,
default: () => <div>PingTab</div>,
}));
jest.mock("../components/SamplingTab", () => ({
__esModule: true,
default: () => <div>SamplingTab</div>,
}));
jest.mock("../components/RootsTab", () => ({
__esModule: true,
default: () => <div>RootsTab</div>,
}));
jest.mock("../components/ElicitationTab", () => ({
__esModule: true,
default: () => <div>ElicitationTab</div>,
}));
jest.mock("../components/MetadataTab", () => ({
__esModule: true,
default: () => <div>MetadataTab</div>,
}));
jest.mock("../components/AuthDebugger", () => ({
__esModule: true,
default: () => <div>AuthDebugger</div>,
}));
jest.mock("../components/HistoryAndNotifications", () => ({
__esModule: true,
default: () => <div>HistoryAndNotifications</div>,
}));
jest.mock("../components/ToolsTab", () => ({
__esModule: true,
default: ({
listTools,
callTool,
}: {
listTools: () => void;
callTool: (
name: string,
params: Record<string, unknown>,
metadata?: Record<string, unknown>,
runAsTask?: boolean,
) => Promise<unknown>;
}) => (
<div data-testid="tools-tab">
<button type="button" onClick={listTools}>
mock list tools
</button>
<button
type="button"
onClick={() => {
void callTool("weatherApp", { city: "Lisbon" });
}}
>
mock run app tool
</button>
</div>
),
}));
jest.mock("../components/AppsTab", () => ({
__esModule: true,
default: (props: AppsTabProps) => {
const prefilled =
props && "prefilledToolCall" in props ? props.prefilledToolCall : null;
const tools = props && "tools" in props ? props.tools : [];
return (
<div data-testid="apps-tab">
<div data-testid="apps-tools">{JSON.stringify(tools)}</div>
<div data-testid="apps-prefilled">
{JSON.stringify(prefilled ?? null)}
</div>
{prefilled && (
<button
type="button"
onClick={() => props?.onPrefilledToolCallConsumed?.(prefilled.id)}
>
consume prefilled
</button>
)}
</div>
);
},
}));
global.fetch = jest.fn().mockResolvedValue({ json: () => Promise.resolve({}) });
jest.mock("../lib/hooks/useConnection", () => ({
useConnection: jest.fn(),
}));
describe("App - Tools to Apps prefilled handoff", () => {
const mockUseConnection = jest.mocked(useConnection);
beforeEach(() => {
jest.clearAllMocks();
window.location.hash = "#tools";
});
it("passes prefilled call data to AppsTab for tools using _meta['ui/resourceUri']", async () => {
const makeRequest = jest.fn(async (request: { method: string }) => {
if (request.method === "tools/list") {
return {
tools: [
{
name: "weatherApp",
inputSchema: {
type: "object",
properties: {
city: { type: "string" },
},
},
_meta: {
"ui/resourceUri": "ui://weather-app",
},
},
],
nextCursor: undefined,
};
}
if (request.method === "tools/call") {
return {
content: [{ type: "text", text: "weather result" }],
};
}
throw new Error(`Unexpected method: ${request.method}`);
});
mockUseConnection.mockReturnValue({
connectionStatus: "connected",
serverCapabilities: { tools: { listChanged: true } },
serverImplementation: null,
mcpClient: {
request: jest.fn(),
notification: jest.fn(),
close: jest.fn(),
} as unknown as Client,
requestHistory: [],
clearRequestHistory: jest.fn(),
makeRequest,
cancelTask: jest.fn(),
listTasks: jest.fn(),
sendNotification: jest.fn(),
handleCompletion: jest.fn(),
completionsSupported: false,
connect: jest.fn(),
disconnect: jest.fn(),
} as ReturnType<typeof useConnection>);
render(<App />);
fireEvent.click(screen.getByRole("button", { name: /mock list tools/i }));
await waitFor(() => {
const tools = JSON.parse(
screen.getByTestId("apps-tools").textContent || "[]",
);
expect(tools).toHaveLength(1);
expect(tools[0].name).toBe("weatherApp");
});
fireEvent.click(screen.getByRole("button", { name: /mock run app tool/i }));
await waitFor(() => {
const prefilled = JSON.parse(
screen.getByTestId("apps-prefilled").textContent || "null",
);
expect(prefilled.toolName).toBe("weatherApp");
expect(prefilled.params).toEqual({ city: "Lisbon" });
expect(prefilled.result.content[0].text).toBe("weather result");
});
fireEvent.click(screen.getByRole("button", { name: /consume prefilled/i }));
await waitFor(() => {
expect(screen.getByTestId("apps-prefilled")).toHaveTextContent("null");
});
});
});

View file

@ -0,0 +1,154 @@
import { useMemo, useState } from "react";
import { Client } from "@modelcontextprotocol/sdk/client/index.js";
import {
Tool,
ContentBlock,
CompatibilityCallToolResult,
CallToolResult,
CallToolResultSchema,
ServerNotification,
LoggingMessageNotificationParams,
} from "@modelcontextprotocol/sdk/types.js";
import {
AppRenderer as McpUiAppRenderer,
type McpUiHostContext,
type RequestHandlerExtra,
} from "@mcp-ui/client";
import {
type McpUiMessageRequest,
type McpUiMessageResult,
} from "@modelcontextprotocol/ext-apps/app-bridge";
import { Alert, AlertDescription } from "@/components/ui/alert";
import { AlertCircle } from "lucide-react";
import { useToast } from "@/lib/hooks/useToast";
interface AppRendererProps {
sandboxPath: string;
tool: Tool;
mcpClient: Client | null;
toolInput?: Record<string, unknown>;
toolResult?: CompatibilityCallToolResult | null;
onNotification?: (notification: ServerNotification) => void;
}
const AppRenderer = ({
sandboxPath,
tool,
mcpClient,
toolInput,
toolResult,
onNotification,
}: AppRendererProps) => {
const [error, setError] = useState<string | null>(null);
const { toast } = useToast();
const normalizedToolResult = useMemo<CallToolResult | undefined>(() => {
if (!toolResult) {
return undefined;
}
if ("content" in toolResult) {
const parsedResult = CallToolResultSchema.safeParse(toolResult);
return parsedResult.success ? parsedResult.data : undefined;
}
if ("toolResult" in toolResult) {
const parsedResult = CallToolResultSchema.safeParse(
toolResult.toolResult,
);
return parsedResult.success ? parsedResult.data : undefined;
}
return undefined;
}, [toolResult]);
const hostContext: McpUiHostContext = useMemo(
() => ({
theme: document.documentElement.classList.contains("dark")
? "dark"
: "light",
}),
[],
);
const handleOpenLink = async ({ url }: { url: string }) => {
let isError = true;
if (url.startsWith("https://") || url.startsWith("http://")) {
window.open(url, "_blank");
isError = false;
}
return { isError };
};
const handleMessage = async (
params: McpUiMessageRequest["params"],
// eslint-disable-next-line @typescript-eslint/no-unused-vars
_extra: RequestHandlerExtra,
): Promise<McpUiMessageResult> => {
const message = params.content
.filter((block): block is ContentBlock & { type: "text" } =>
Boolean(block.type === "text"),
)
.map((block) => block.text)
.join("\n");
if (message) {
toast({
description: message,
});
}
return {};
};
const handleLoggingMessage = (params: LoggingMessageNotificationParams) => {
if (onNotification) {
onNotification({
method: "notifications/message",
params,
} as ServerNotification);
}
};
if (!mcpClient) {
return (
<Alert>
<AlertCircle className="h-4 w-4" />
<AlertDescription>Waiting for MCP client...</AlertDescription>
</Alert>
);
}
return (
<div className="flex flex-col h-full">
{error && (
<Alert variant="destructive" className="mb-4">
<AlertCircle className="h-4 w-4" />
<AlertDescription>{error}</AlertDescription>
</Alert>
)}
<div
className="flex-1 border rounded overflow-hidden"
style={{ minHeight: "400px" }}
>
<McpUiAppRenderer
client={mcpClient}
onOpenLink={handleOpenLink}
onMessage={handleMessage}
onLoggingMessage={handleLoggingMessage}
toolName={tool.name}
hostContext={hostContext}
toolInput={toolInput}
toolResult={normalizedToolResult}
sandbox={{
url: new URL(sandboxPath, window.location.origin),
}}
onError={(err) => setError(err.message)}
/>
</div>
</div>
);
};
export default AppRenderer;

View file

@ -0,0 +1,677 @@
import { useEffect, useState, useCallback, useRef } from "react";
import { TabsContent } from "@/components/ui/tabs";
import { Button } from "@/components/ui/button";
import { Alert, AlertDescription } from "@/components/ui/alert";
import {
AlertCircle,
X,
Play,
Loader2,
ChevronRight,
Maximize2,
Minimize2,
} from "lucide-react";
import {
Tool,
ServerNotification,
CompatibilityCallToolResult,
} from "@modelcontextprotocol/sdk/types.js";
import { Client } from "@modelcontextprotocol/sdk/client/index.js";
import { getToolUiResourceUri } from "@modelcontextprotocol/ext-apps/app-bridge";
import AppRenderer from "./AppRenderer";
import ListPane from "./ListPane";
import IconDisplay, { WithIcons } from "./IconDisplay";
import { Label } from "@/components/ui/label";
import { Checkbox } from "@/components/ui/checkbox";
import {
Select,
SelectContent,
SelectItem,
SelectTrigger,
SelectValue,
} from "@/components/ui/select";
import { Textarea } from "@/components/ui/textarea";
import { Input } from "@/components/ui/input";
import DynamicJsonForm, { DynamicJsonFormRef } from "./DynamicJsonForm";
import { JsonSchemaType, JsonValue } from "@/utils/jsonUtils";
import {
generateDefaultValue,
isPropertyRequired,
normalizeUnionType,
resolveRef,
} from "@/utils/schemaUtils";
interface AppsTabProps {
sandboxPath: string;
tools: Tool[];
listTools: () => void;
callTool: (
name: string,
params: Record<string, unknown>,
metadata?: Record<string, unknown>,
runAsTask?: boolean,
) => Promise<CompatibilityCallToolResult>;
prefilledToolCall?: {
id: number;
toolName: string;
params: Record<string, unknown>;
result: CompatibilityCallToolResult;
} | null;
onPrefilledToolCallConsumed?: (callId: number) => void;
error: string | null;
mcpClient: Client | null;
onNotification?: (notification: ServerNotification) => void;
}
// Type guard to check if a tool has UI metadata
const hasUIMetadata = (tool: Tool): boolean => {
return !!getToolUiResourceUri(tool);
};
const cloneToolParams = (
source: Record<string, unknown>,
): Record<string, unknown> => {
try {
return structuredClone(source);
} catch {
return { ...source };
}
};
const AppsTab = ({
sandboxPath,
tools,
listTools,
callTool,
prefilledToolCall,
onPrefilledToolCallConsumed,
error,
mcpClient,
onNotification,
}: AppsTabProps) => {
const [appTools, setAppTools] = useState<Tool[]>([]);
const [selectedTool, setSelectedTool] = useState<Tool | null>(null);
const [params, setParams] = useState<Record<string, unknown>>({});
const [isAppOpen, setIsAppOpen] = useState(false);
const [isOpeningApp, setIsOpeningApp] = useState(false);
const [isMaximized, setIsMaximized] = useState(false);
const [hasValidationErrors, setHasValidationErrors] = useState(false);
const [submittedParams, setSubmittedParams] = useState<
Record<string, unknown> | undefined
>(undefined);
const [submittedToolResult, setSubmittedToolResult] =
useState<CompatibilityCallToolResult | null>(null);
const formRefs = useRef<Record<string, DynamicJsonFormRef | null>>({});
const openAppRunIdRef = useRef(0);
const prefillingParamsRef = useRef<Record<string, unknown> | null>(null);
const consumedPrefilledCallIdRef = useRef<number | null>(null);
const buildInitialParams = useCallback((tool: Tool) => {
const initialParams = Object.entries(tool.inputSchema.properties ?? []).map(
([key, value]) => {
const resolvedValue = resolveRef(
value as JsonSchemaType,
tool.inputSchema as JsonSchemaType,
);
return [
key,
generateDefaultValue(
resolvedValue,
key,
tool.inputSchema as JsonSchemaType,
),
];
},
);
return Object.fromEntries(initialParams);
}, []);
// Function to check if any form has validation errors
const checkValidationErrors = useCallback(() => {
const errors = Object.values(formRefs.current).some(
(ref) => ref && !ref.validateJson().isValid,
);
setHasValidationErrors(errors);
return errors;
}, []);
// Filter tools that have UI metadata
useEffect(() => {
const filtered = tools.filter(hasUIMetadata);
console.log("[AppsTab] Filtered app tools:", {
totalTools: tools.length,
appTools: filtered.length,
appToolNames: filtered.map((t) => t.name),
});
setAppTools(filtered);
// If current selected tool is no longer available, reset selection
if (selectedTool && !filtered.find((t) => t.name === selectedTool.name)) {
setSelectedTool(null);
setIsAppOpen(false);
setSubmittedParams(undefined);
setSubmittedToolResult(null);
}
}, [tools, selectedTool]);
useEffect(() => {
if (selectedTool) {
const prefillingParams = prefillingParamsRef.current;
if (prefillingParams) {
setParams(prefillingParams);
prefillingParamsRef.current = null;
} else {
setParams(buildInitialParams(selectedTool));
}
setHasValidationErrors(false);
formRefs.current = {};
} else {
setParams({});
setIsAppOpen(false);
setSubmittedParams(undefined);
setSubmittedToolResult(null);
}
}, [buildInitialParams, selectedTool]);
useEffect(() => {
if (!prefilledToolCall) {
return;
}
if (consumedPrefilledCallIdRef.current === prefilledToolCall.id) {
return;
}
const matchingTool = appTools.find(
(tool) => tool.name === prefilledToolCall.toolName,
);
if (!matchingTool) {
return;
}
const hydratedParams = cloneToolParams(prefilledToolCall.params);
openAppRunIdRef.current += 1;
setIsOpeningApp(false);
prefillingParamsRef.current = hydratedParams;
setSelectedTool(matchingTool);
setSubmittedParams(hydratedParams);
setSubmittedToolResult(prefilledToolCall.result);
setIsAppOpen(true);
setIsMaximized(false);
consumedPrefilledCallIdRef.current = prefilledToolCall.id;
onPrefilledToolCallConsumed?.(prefilledToolCall.id);
}, [appTools, onPrefilledToolCallConsumed, prefilledToolCall]);
const handleRefresh = useCallback(() => {
listTools();
}, [listTools]);
const executeToolAndOpenApp = useCallback(
async (tool: Tool, toolParams: Record<string, unknown>) => {
const runId = ++openAppRunIdRef.current;
const runParams = cloneToolParams(toolParams);
prefillingParamsRef.current = null;
setIsOpeningApp(true);
setSubmittedParams(runParams);
setSubmittedToolResult(null);
try {
const result = await callTool(tool.name, runParams);
if (runId !== openAppRunIdRef.current) {
return;
}
setSubmittedParams(runParams);
setSubmittedToolResult(result);
setIsAppOpen(true);
} catch {
if (runId !== openAppRunIdRef.current) {
return;
}
setSubmittedToolResult(null);
setIsAppOpen(false);
} finally {
if (runId === openAppRunIdRef.current) {
setIsOpeningApp(false);
}
}
},
[callTool],
);
const handleCloseApp = useCallback(() => {
openAppRunIdRef.current += 1;
setIsOpeningApp(false);
setIsAppOpen(false);
setSubmittedToolResult(null);
}, []);
const handleOpenApp = useCallback(async () => {
if (!selectedTool || checkValidationErrors()) {
return;
}
await executeToolAndOpenApp(selectedTool, params);
}, [checkValidationErrors, executeToolAndOpenApp, params, selectedTool]);
const handleSelectTool = useCallback(
(tool: Tool) => {
openAppRunIdRef.current += 1;
setIsOpeningApp(false);
prefillingParamsRef.current = null;
setSelectedTool(tool);
setSubmittedParams(undefined);
setSubmittedToolResult(null);
const hasFields =
tool.inputSchema.properties &&
Object.keys(tool.inputSchema.properties).length > 0;
if (hasFields) {
setIsAppOpen(false);
return;
}
const initialParams = buildInitialParams(tool);
void executeToolAndOpenApp(tool, initialParams);
},
[buildInitialParams, executeToolAndOpenApp],
);
const handleDeselectTool = useCallback(() => {
openAppRunIdRef.current += 1;
setIsOpeningApp(false);
prefillingParamsRef.current = null;
setSelectedTool(null);
setIsAppOpen(false);
setIsMaximized(false);
setSubmittedParams(undefined);
setSubmittedToolResult(null);
}, []);
return (
<TabsContent value="apps" className="space-y-4">
<div
className={
isMaximized
? "grid grid-cols-1 gap-4"
: "grid grid-cols-1 md:grid-cols-2 gap-4"
}
>
{!isMaximized && (
<ListPane
items={appTools}
listItems={handleRefresh}
setSelectedItem={handleSelectTool}
renderItem={(tool) => {
return (
<div className="flex items-start w-full gap-2">
<div className="flex-shrink-0 mt-1">
<IconDisplay icons={(tool as WithIcons).icons} size="sm" />
</div>
<div className="flex flex-col flex-1 min-w-0">
<span className="truncate font-semibold">{tool.name}</span>
{tool.description && (
<span className="text-sm text-gray-500 text-left line-clamp-2">
{tool.description}
</span>
)}
</div>
<ChevronRight className="w-4 h-4 flex-shrink-0 text-gray-400 mt-1" />
</div>
);
}}
title="MCP Apps"
buttonText="Refresh Apps"
/>
)}
<div className="bg-card border border-border rounded-lg shadow">
<div className="p-4 border-b border-gray-200 dark:border-border">
<div className="flex items-center justify-between">
<div className="flex items-center gap-2">
{selectedTool && (
<IconDisplay
icons={(selectedTool as WithIcons).icons}
size="md"
/>
)}
<h3 className="font-semibold">
{selectedTool ? selectedTool.name : "Select an app"}
</h3>
</div>
<div className="flex items-center gap-2">
{selectedTool && isAppOpen && (
<Button
onClick={() => setIsMaximized(!isMaximized)}
variant="ghost"
size="sm"
aria-label={isMaximized ? "Minimize" : "Maximize"}
>
{isMaximized ? (
<Minimize2 className="w-4 h-4" />
) : (
<Maximize2 className="w-4 h-4" />
)}
</Button>
)}
{selectedTool && (
<Button
onClick={handleDeselectTool}
variant="ghost"
size="sm"
aria-label="Close app"
>
<X className="w-4 h-4" />
</Button>
)}
</div>
</div>
</div>
<div className="p-4">
{error && (
<Alert variant="destructive" className="mb-4">
<AlertCircle className="h-4 w-4" />
<AlertDescription>{error}</AlertDescription>
</Alert>
)}
{selectedTool ? (
(() => {
const hasFields =
selectedTool.inputSchema.properties &&
Object.keys(selectedTool.inputSchema.properties).length > 0;
return (
<div className="space-y-4">
{!isAppOpen ? (
<div className="space-y-4">
{selectedTool.description && (
<p className="text-sm text-gray-600 dark:text-gray-400 whitespace-pre-wrap">
{selectedTool.description}
</p>
)}
<div className="space-y-4 border rounded-lg p-4 bg-muted/30">
<h4 className="font-medium text-sm">App Input</h4>
{Object.entries(
selectedTool.inputSchema.properties ?? [],
).map(([key, value]) => {
// First resolve any $ref references
const resolvedValue = resolveRef(
value as JsonSchemaType,
selectedTool.inputSchema as JsonSchemaType,
);
const prop = normalizeUnionType(resolvedValue);
const inputSchema =
selectedTool.inputSchema as JsonSchemaType;
const required = isPropertyRequired(
key,
inputSchema,
);
return (
<div key={key} className="space-y-2">
<div className="flex justify-between">
<Label
htmlFor={key}
className="block text-sm font-medium text-gray-700 dark:text-gray-300"
>
{key}
{required && (
<span className="text-red-500 ml-1">
*
</span>
)}
</Label>
{prop.nullable ? (
<div className="flex items-center space-x-2">
<Checkbox
id={`${key}-null`}
checked={params[key] === null}
onCheckedChange={(checked: boolean) =>
setParams({
...params,
[key]: checked
? null
: prop.type === "array"
? undefined
: prop.default !== null
? prop.default
: prop.type === "boolean"
? false
: prop.type === "string"
? ""
: undefined,
})
}
/>
<label
htmlFor={`${key}-null`}
className="text-sm font-medium text-gray-700 dark:text-gray-300"
>
null
</label>
</div>
) : null}
</div>
<div
className={`${prop.nullable && params[key] === null ? "pointer-events-none opacity-50" : ""}`}
>
{prop.type === "boolean" ? (
<div className="flex items-center space-x-2">
<Checkbox
id={key}
checked={!!params[key]}
onCheckedChange={(checked: boolean) =>
setParams({
...params,
[key]: checked,
})
}
/>
<label
htmlFor={key}
className="text-sm font-medium text-gray-700 dark:text-gray-300"
>
{prop.description ||
"Toggle this option"}
</label>
</div>
) : prop.type === "string" && prop.enum ? (
<Select
value={
params[key] === undefined
? ""
: String(params[key])
}
onValueChange={(value) => {
setParams({
...params,
[key]:
value === "" ? undefined : value,
});
}}
>
<SelectTrigger id={key}>
<SelectValue
placeholder={
prop.description ||
"Select an option"
}
/>
</SelectTrigger>
<SelectContent>
{prop.enum.map((option) => (
<SelectItem
key={option}
value={option}
>
{option}
</SelectItem>
))}
</SelectContent>
</Select>
) : prop.type === "string" ? (
<Textarea
id={key}
placeholder={prop.description}
value={
params[key] === undefined
? ""
: String(params[key])
}
onChange={(e) => {
setParams({
...params,
[key]:
e.target.value === ""
? undefined
: e.target.value,
});
}}
/>
) : prop.type === "object" ||
prop.type === "array" ? (
<DynamicJsonForm
ref={(ref) =>
(formRefs.current[key] = ref)
}
schema={{
type: prop.type,
properties: prop.properties,
description: prop.description,
items: prop.items,
}}
value={
(params[key] as JsonValue) ??
generateDefaultValue(prop)
}
onChange={(newValue: JsonValue) => {
setParams({
...params,
[key]: newValue,
});
setTimeout(checkValidationErrors, 100);
}}
/>
) : prop.type === "number" ||
prop.type === "integer" ? (
<Input
type="number"
id={key}
placeholder={prop.description}
value={
params[key] === undefined
? ""
: String(params[key])
}
onChange={(e) => {
const value = e.target.value;
if (value === "") {
setParams({
...params,
[key]: undefined,
});
} else {
const num = Number(value);
setParams({
...params,
[key]: isNaN(num) ? value : num,
});
}
}}
/>
) : (
<DynamicJsonForm
ref={(ref) =>
(formRefs.current[key] = ref)
}
schema={{
type: prop.type,
properties: prop.properties,
description: prop.description,
items: prop.items,
}}
value={params[key] as JsonValue}
onChange={(newValue: JsonValue) => {
setParams({
...params,
[key]: newValue,
});
setTimeout(checkValidationErrors, 100);
}}
/>
)}
</div>
</div>
);
})}
<Button
onClick={() => void handleOpenApp()}
className="w-full"
disabled={hasValidationErrors || isOpeningApp}
>
{isOpeningApp ? (
<Loader2 className="w-4 h-4 mr-2 animate-spin" />
) : (
<Play className="w-4 h-4 mr-2" />
)}
{isOpeningApp ? "Opening App..." : "Open App"}
</Button>
</div>
</div>
) : (
<div className="space-y-4">
{hasFields && (
<div className="flex justify-end">
<Button
onClick={handleCloseApp}
variant="outline"
size="sm"
>
Back to Input
</Button>
</div>
)}
<div className="h-[600px]">
<AppRenderer
sandboxPath={sandboxPath}
tool={selectedTool}
mcpClient={mcpClient}
toolInput={submittedParams}
toolResult={submittedToolResult}
onNotification={onNotification}
/>
</div>
</div>
)}
</div>
);
})()
) : (
<div className="flex flex-col items-center justify-center py-12 text-muted-foreground space-y-4">
<AlertCircle className="w-12 h-12 opacity-20" />
<p>Select an app from the list to get started</p>
{appTools.length === 0 && (
<p className="text-xs text-center max-w-[200px]">
No MCP Apps available. Apps are tools that include a{" "}
<code className="bg-muted px-1 rounded">
_meta.ui.resourceUri
</code>
</p>
)}
</div>
)}
</div>
</div>
</div>
</TabsContent>
);
};
export default AppsTab;

View file

@ -125,6 +125,9 @@ const DynamicJsonForm = forwardRef<DynamicJsonFormRef, DynamicJsonFormProps>(
const [rawJsonValue, setRawJsonValue] = useState<string>(
JSON.stringify(value ?? generateDefaultValue(schema), null, 2),
);
const [numericInputDrafts, setNumericInputDrafts] = useState<
Record<string, string>
>({});
// Use a ref to manage debouncing timeouts to avoid parsing JSON
// on every keystroke which would be inefficient and error-prone
@ -134,6 +137,37 @@ const DynamicJsonForm = forwardRef<DynamicJsonFormRef, DynamicJsonFormProps>(
return !!jsonError;
};
const getPathKey = (path: string[]) =>
path.length === 0 ? "$root" : path.join(".");
const getNumericDisplayValue = (
path: string[],
currentValue: JsonValue,
): string => {
const pathKey = getPathKey(path);
if (Object.prototype.hasOwnProperty.call(numericInputDrafts, pathKey)) {
return numericInputDrafts[pathKey];
}
return typeof currentValue === "number" ? currentValue.toString() : "";
};
const updateNumericDraft = (path: string[], draftValue: string) => {
const pathKey = getPathKey(path);
setNumericInputDrafts((prev) => ({ ...prev, [pathKey]: draftValue }));
};
const clearNumericDraft = (path: string[]) => {
const pathKey = getPathKey(path);
setNumericInputDrafts((prev) => {
if (!Object.prototype.hasOwnProperty.call(prev, pathKey)) {
return prev;
}
const next = { ...prev };
delete next[pathKey];
return next;
});
};
// Debounce JSON parsing and parent updates to handle typing gracefully
const debouncedUpdateParent = useCallback(
(jsonString: string) => {
@ -429,9 +463,10 @@ const DynamicJsonForm = forwardRef<DynamicJsonFormRef, DynamicJsonFormProps>(
return (
<Input
type="number"
value={(currentValue as number)?.toString() ?? ""}
value={getNumericDisplayValue(path, currentValue)}
onChange={(e) => {
const val = e.target.value;
updateNumericDraft(path, val);
if (!val && !isRequired) {
handleFieldChange(path, undefined);
} else {
@ -441,6 +476,19 @@ const DynamicJsonForm = forwardRef<DynamicJsonFormRef, DynamicJsonFormProps>(
}
}
}}
onBlur={(e) => {
const val = e.target.value;
if (!val) {
clearNumericDraft(path);
return;
}
const num = Number(val);
if (!isNaN(num)) {
handleFieldChange(path, num);
}
clearNumericDraft(path);
}}
placeholder={propSchema.description}
required={isRequired}
min={propSchema.minimum}
@ -453,9 +501,10 @@ const DynamicJsonForm = forwardRef<DynamicJsonFormRef, DynamicJsonFormProps>(
<Input
type="number"
step="1"
value={(currentValue as number)?.toString() ?? ""}
value={getNumericDisplayValue(path, currentValue)}
onChange={(e) => {
const val = e.target.value;
updateNumericDraft(path, val);
if (!val && !isRequired) {
handleFieldChange(path, undefined);
} else {
@ -465,6 +514,19 @@ const DynamicJsonForm = forwardRef<DynamicJsonFormRef, DynamicJsonFormProps>(
}
}
}}
onBlur={(e) => {
const val = e.target.value;
if (!val) {
clearNumericDraft(path);
return;
}
const num = Number(val);
if (!isNaN(num) && Number.isInteger(num)) {
handleFieldChange(path, num);
}
clearNumericDraft(path);
}}
placeholder={propSchema.description}
required={isRequired}
min={propSchema.minimum}

View file

@ -6,7 +6,7 @@ import { useState, useMemo, useRef } from "react";
type ListPaneProps<T> = {
items: T[];
listItems: () => void;
clearItems: () => void;
clearItems?: () => void;
setSelectedItem: (item: T) => void;
renderItem: (item: T) => React.ReactNode;
title: string;
@ -101,14 +101,16 @@ const ListPane = <T extends object>({
>
{buttonText}
</Button>
<Button
variant="outline"
className="w-full mb-4"
onClick={clearItems}
disabled={items.length === 0}
>
Clear
</Button>
{clearItems && (
<Button
variant="outline"
className="w-full mb-4"
onClick={clearItems}
disabled={items.length === 0}
>
Clear
</Button>
)}
<div className="space-y-2 overflow-y-auto max-h-96">
{filteredItems.map((item, index) => (
<div

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