Frankfurter for ChatGPT

io.github.pipeworx-io/frankfurter

Frankfurter MCP — wraps Frankfurter API (api.frankfurter.dev)

client:ChatGPT transport:streamable-http

Install Frankfurter in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://gateway.pipeworx.io/frankfurter/mcp

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