labs-catalog-mcp

A real MCP server, with a real captured session. LB-07 in the AI Labs portfolio's Live Builds collection: the portfolio's MCP Server Contract Workbench (GAP-01) simulates the wire protocol to teach it — this repo is the live counterpart a real client can connect to.

The server exposes the portfolio's own labs registry as tools:

Run it

npm install
npm start            # stdio MCP server
npm run capture      # real client session -> session-transcript.jsonl + console output

Related MCP server: Enterprise MCP Gateway and Tool Registry

Connect Claude Desktop

{
  "mcpServers": {
    "labs-catalog": { "command": "node", "args": ["/absolute/path/to/server.mjs"] }
  }
}

The captured session

session-transcript.jsonl / session.md hold an actual recorded session — initialize handshake, tools/list, and three tool calls, both directions, timestamped. Recorded by tee-wire.mjs, a 30-line wire tap between client and server; re-run npm run capture and it regenerates. No frame in this repo is hand-written.

Honesty & attribution

Built on @modelcontextprotocol/sdk (MIT) and zod. Catalog data is a generated snapshot of the portfolio's packages/kit/src/registry.ts. Server, wire tap, and capture harness are original. MIT licensed.