rendezvous-mcp

Nostr: npub1mgvlrnf5hm9yf0n5mf9nqmvarhvxkc6remu5ec3vf8r0txqkuk7su0e7q2

Fair meeting points for AI — isochrone-based fairness, not naive midpoints.

MCP server for AI-driven meeting point discovery. Give your AI the ability to answer "where should we meet?" using real travel times, venue availability, and fairness algorithms.

Works out of the box — free public routing, no API keys needed. Self-host Valhalla for unlimited queries, or use L402 Lightning credits for our hosted endpoint.

Tools

| Tool | Description | |------|-------------| | score-venues | Score candidate venues by travel time fairness for 2–10 participants | | search-venues | Search for venues near a location using OpenStreetMap | | get-isochrone | Get a reachability polygon (everywhere reachable within N minutes) | | get-directions | Get directions between two points with turn-by-turn steps | | store-routing-credentials | Store L402 macaroon + preimage after Lightning payment |

Quick start

Add to your MCP client config (Claude Code, Claude Desktop, Cursor, etc.):

{
  "mcpServers": {
    "rendezvous": {
      "command": "npx",
      "args": ["rendezvous-mcp"]
    }
  }
}

Then ask your AI: "Where's a fair place for Alice in London, Bob in Bristol, and Carol in Birmingham to meet for lunch?"

Remote (HTTP/SSE)

For ChatGPT, remote AI agents, or any client that connects over HTTP:

TRANSPORT=http npx rendezvous-mcp

Starts a Streamable HTTP server on port 3002 with the MCP endpoint at /mcp.

ChatGPT connector

In ChatGPT settings, add an MCP server with:

• URL: http://your-host:3002/mcp
• Transport: Streamable HTTP

Configuration

| Variable | Default | Description | |----------|---------|-------------| | TRANSPORT | stdio | Transport mode: stdio or http | | PORT | 3002 | HTTP server port (HTTP mode only) | | HOST | 0.0.0.0 | HTTP bind address (HTTP mode only) | | VALHALLA_URL | https://routing.trotters.cc | Routing engine URL | | OVERPASS_URL | Public endpoints | Venue search API |

Self-hosted routing

For unlimited queries with no rate limits, run your own Valhalla instance:

{
  "mcpServers": {
    "rendezvous": {
      "command": "npx",
      "args": ["rendezvous-mcp"],
      "env": {
        "VALHALLA_URL": "http://localhost:8002"
      }
    }
  }
}

How it works

1. User asks "Where should we meet?"
2. AI geocodes participant locations
3. AI calls search-venues to find candidate venues near the area
4. AI calls score-venues with participants + candidates — returns ranked results with travel times and fairness scores
5. AI presents the fairest option with travel times for each person

For deeper analysis, the AI can use get-isochrone to visualise reachability and get-directions for turn-by-turn navigation.

L402 payments

The default routing endpoint (routing.trotters.cc) offers free requests. When the free tier is exhausted, tools return a payment_required response with a Lightning invoice. After payment, call store-routing-credentials to store the macaroon for the session.

Self-hosted Valhalla has no payment requirement.

Architecture

Thin MCP wrapper over rendezvous-kit — the open-source TypeScript library for isochrone intersection, venue search, and fairness scoring. Each tool is an extracted handler function (testable without MCP) plus a registration one-liner.

Development

npm install
npm run build
npm test

Licence

MIT

Support

For issues and feature requests, see GitHub Issues.

If you find rendezvous-mcp useful, consider sending a tip:

• Lightning: [email protected]
• Nostr zaps: npub1mgvlrnf5hm9yf0n5mf9nqmvarhvxkc6remu5ec3vf8r0txqkuk7su0e7q2