| Filename | Latest commit message | Latest commit date |
|---|---|---|
e13732ad38Changes since 1.2.0: - fix: bundle SDK+zod in react-with-deps (was byte-identical to ./react) (#539) - fix(build): copy schema.json to dist and externalize zod (#534) - fix: skip debug log for high-frequency tool-input-partial notifications (#546) - fix(deps): drop @hono/node-server override to patch GHSA-wc8c-qw6v-h7f6 (#535) - fix(readme): use picture element for theme-aware logo (#545) - fix(ci): require maintainer association for /update-snapshots trigger (#532) - fix: pre-commit stages only originally-staged files; add .npmrc (#538) - ci: use npm ci with caching, validate typedoc links, align Node versions (#533) - test: exclude screenshot-gen from default E2E run; wire pdf-server tests (#537) |
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| .. | ||
| src | ||
| .gitignore | ||
| grid-cell.png | ||
| main.ts | ||
| mcp-app.html | ||
| package.json | ||
| README.md | ||
| screenshot.png | ||
| server.ts | ||
| tsconfig.json | ||
| tsconfig.server.json | ||
| vite.config.ts | ||
Debug Server
A comprehensive testing/debugging tool for the MCP Apps SDK that exercises every capability, callback, and result format combination.
Tools
debug-tool
Configurable tool for testing all result variations:
| Parameter | Type | Default | Description |
|---|---|---|---|
contentType |
"text" | "image" | "audio" | "resource" | "resourceLink" | "mixed" |
"text" |
Content block type to return |
multipleBlocks |
boolean | false |
Return 3 content blocks |
includeStructuredContent |
boolean | true |
Include structuredContent in result |
includeMeta |
boolean | false |
Include _meta in result |
largeInput |
string | - | Large text input (tests tool-input-partial) |
simulateError |
boolean | false |
Return isError: true |
delayMs |
number | - | Delay before response (ms) |
debug-refresh
App-only tool (hidden from model) for polling server state. Returns current timestamp and call counter.
App UI
The debug app provides a dashboard with:
- Event Log: Real-time log of all SDK events with filtering
- Host Info: Context, capabilities, container dimensions, styles
- Callback Status: Table of all callbacks with call counts
- Actions: Buttons to test every SDK method:
- Send messages (text/image)
- Logging (debug/info/warning/error)
- Model context updates
- Display mode requests
- Link opening
- Resize controls
- Server tool calls
- File operations
Usage
# Build
npm run --workspace examples/debug-server build
# Run standalone
npm run --workspace examples/debug-server serve
# Run with all examples
npm start
Then open http://localhost:8080/basic-host/ and select "Debug MCP App Server" from the dropdown.