Flat Earth Science for ChatGPT

org.flatearthscience/flatearthscience-org

Earth curvature, horizon, flight, Sun and daylight calculators plus tested flat-earth claims.

client:ChatGPT transport:streamable-http tools:8

Install Flat Earth Science in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://flatearthscience.org/api/mcp

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