Cafeteria MCP

Configurable MCP server for cafeteria menu lookup.

The server exposes a single MCP tool, get_cafeteria_menu, and supports stdio plus HTTP/SSE transports.

Configuration

Set these environment variables in your runtime or hosting provider:

CAFETERIA_API_URL=<form-post-api-url>
CAFETERIA_CAMPUS=<campus-code>
CAFETERIA_SEQ=<cafeteria-sequence>
CAFETERIA_ORIGIN=<optional-origin-header>
CAFETERIA_SKIP_TLS_VERIFY=false
MCP_TRANSPORT=http

CAFETERIA_ORIGIN is optional. When omitted, the origin is derived from CAFETERIA_API_URL. The upstream request is sent as POST with query parameters and Content-Length: 0. Set CAFETERIA_SKIP_TLS_VERIFY=true only when the upstream cafeteria API requires curl-style -k behavior.

Tool

get_cafeteria_menu

• ymd: lookup date, YYYYMMDD or YYYY-MM-DD. Defaults to today in Asia/Seoul.
• mealType: LN for lunch, DN for dinner.

Local stdio

npm start

MCP client example:

{
  "mcpServers": {
    "cafeteria": {
      "command": "node",
      "args": [
        "/absolute/path/to/src/server.mjs"
      ]
    }
  }
}

HTTP/SSE

MCP_TRANSPORT=http PORT=3333 npm start

• Health check: GET http://127.0.0.1:3333/health
• MCP SSE: GET http://127.0.0.1:3333/sse
• MCP SSE message post: POST http://127.0.0.1:3333/messages?sessionId=...
• MCP JSON-RPC test endpoint: POST http://127.0.0.1:3333/mcp

Hosting environments that provide PORT automatically run the HTTP/SSE transport.

Render

Deploy the repository with the included render.yaml Blueprint.

After deployment, set the required secret environment variables in Render. The public MCP SSE URL will be:

https://<render-service-name>.onrender.com/sse

See outputs/render-sse-mcp.md for a short registration note.

Supabase Probe

This repository also includes a Supabase Edge Function probe at supabase/functions/cafeteria-probe. Use it before porting the MCP server to confirm whether the Supabase runtime can reach the cafeteria API.

Required Supabase secrets:

CAFETERIA_API_URL
CAFETERIA_CAMPUS
CAFETERIA_SEQ
CAFETERIA_ORIGIN

Probe URLs after deployment:

https://<project-ref>.functions.supabase.co/cafeteria-probe?target=google
https://<project-ref>.functions.supabase.co/cafeteria-probe?target=cafeteria&ymd=20260608&mealType=LN

Supabase MCP

The Supabase Edge Function MCP endpoint is available at:

https://<project-ref>.functions.supabase.co/cafeteria-mcp

It supports MCP JSON-RPC methods including initialize, tools/list, and tools/call.

Tests

npm run test:sse
npm run test:mcp
npm run test:api -- 20260608 LN

test:api requires the environment variables above.