databutler facts for ChatGPT

io.github.physics-star-cat/databutler-facts

Official thresholds, rates and fees by key, with source, verified date and signature.

client:ChatGPT transport:streamable-http tools:3

Install databutler facts in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://databutler.dev/api/mcp/facts

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