trc-mcp

Remote MCP server for the Transparency Certificate directory. A thin, stateless, read-only wrapper over the public directory REST API, deployed as a Cloudflare Worker (Streamable HTTP transport, no auth, no Durable Objects).

Tools

Tool	Wraps	Description
search_businesses	GET /api/v1/businesses	Search certified businesses by text, category, city, state or ZIP (paginated)
get_business	GET /api/v1/businesses/:id	Full public record of a single certified business

Endpoints

Path	Purpose
/mcp	MCP endpoint (Streamable HTTP)
/.well-known/mcp/server-card.json	MCP Server Card (SEP-1649 draft)
/	Human/agent-readable pointer to the above

Development

npm install
npm run dev        # wrangler dev → http://localhost:8787/mcp
npm run typecheck

Note: wrangler dev fails when this folder is nested inside the main app checkout (it walks up and finds the main app's .wrangler/deploy/config.json). Run it from a standalone checkout, or copy the folder outside the main repo.

.dev.vars (gitignored) can override API_BASE for local development — e.g. API_BASE=http://trc-astro:4321 to hit the local directory API instead of production (production /api/v1/businesses 404s until launch while DIRECTORY_HIDDEN=true).

Quick smoke test:

curl -s http://localhost:8787/mcp -X POST \
  -H 'Content-Type: application/json' -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-06-18","capabilities":{},"clientInfo":{"name":"curl","version":"0"}}}'

Or connect Claude Code directly:

claude mcp add --transport http trc-directory http://localhost:8787/mcp

Deploy

npm run deploy

API_BASE (the public directory origin the tools call) is set in wrangler.toml [vars]. Point it at the production domain once the directory launches.

Recommended: attach a custom domain (e.g. mcp.transparencycertified.com) in the Cloudflare dashboard.

Server Card on the main site

For agent discovery, the main site should serve /.well-known/mcp/server-card.json with the same JSON this worker serves, with transport.endpoint set to the deployed /mcp URL. See src/index.ts for the card shape.

Note: the Server Card schema (SEP-1649) is still a draft — see https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2127.