Frankfurter for ChatGPT
io.github.lineofflight/frankfurter
Convert currencies and fetch blended FX rates from 50+ institutional sources.
client:ChatGPT
transport:streamable-http
tools:4
Install Frankfurter in ChatGPT
Settings → Connectors → Advanced → Developer mode
https://mcp.frankfurter.dev/Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs