modelcontextprotocol/ext-apps
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Mirror of https://github.com/modelcontextprotocol/ext-apps — Official repo for spec & SDK of MCP Apps protocol - standard for UIs embedded AI chatbots, served by MCP servers
24 commits 1 branch 37 tags 25 MiB
  • TypeScript 76.4%
  • MDX 19.3%
  • JavaScript 4.3%
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Filename Latest commit message Latest commit date
Anton Pidkuiko MacBook bd5a34ba07
 fix: use consistent text/vnd.mcp.ui+html mimeType throughout 
Replace all occurrences of text/html with text/vnd.mcp.ui+html
in the specification and example code for consistency.

The spec already defined text/vnd.mcp.ui+html in the capability
negotiation section but used text/html in other places.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-21 19:32:46 +00:00
examples/simple-server fix: use consistent text/vnd.mcp.ui+html mimeType throughout 2025-11-21 19:32:46 +00:00
specification/draft fix: use consistent text/vnd.mcp.ui+html mimeType throughout 2025-11-21 19:32:46 +00:00
src AppHost -> AppBridge 2025-11-21 17:51:33 +00:00
.gitignore Initial commit 2025-11-21 11:56:27 +00:00
app.ts Initial commit 2025-11-21 11:56:27 +00:00
build.bun.ts build w/ bun to avoid internal deps hell 2025-11-21 19:28:45 +00:00
build.esbuild.ts build w/ bun to avoid internal deps hell 2025-11-21 19:28:45 +00:00
message-transport.ts Initial commit 2025-11-21 11:56:27 +00:00
package.json build w/ bun to avoid internal deps hell 2025-11-21 19:28:45 +00:00
README.md Update README.md 2025-11-21 19:02:11 +00:00
tsconfig.json Initial commit 2025-11-21 11:56:27 +00:00
types.ts ui/notifications/tool-input* (singular to match inputSchema) 2025-11-21 14:03:20 +00:00

README.md

@modelcontextprotocol/ext-apps

This repo contains the SDK and specification for MCP Apps Extension (SEP-1865).

MCP Apps are a standard inspired by OpenAI's Apps SDK and MCP-UI to allow MCP Servers to display interactive UI elements in conversational MCP clients / chatbots.

Installation

This repo is in flux and isn't published to npm (when it is, we'll probably use the @modelcontextprotocol/ext-apps package). Please install it from git for now:

npm install git+https://github.com/modelcontextprotocol/ext-apps.git

Development Notes

Build tools in dependencies

The build tools (esbuild, tsx, typescript) are in dependencies rather than devDependencies. This is intentional: it allows the prepare script to run when the package is installed from git, since npm doesn't install devDependencies for git dependencies.

Once the package is published to npm with pre-built dist/, these can be moved back to devDependencies.