atlas for ChatGPT

com.trainrouter/atlas

The world railway atlas as MCP tools: notable train routes, night trains, journey times.

client:ChatGPT transport:streamable-http tools:7

Install atlas in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://trainrouter.com/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs