FastballAPI for ChatGPT
io.github.noahowsh/fastballapi
MLB since 2015 plus college: pitches, plate appearances, box scores, odds by book. REST and MCP.
client:ChatGPT
transport:streamable-http
tools:20
Install FastballAPI in ChatGPT
Settings → Connectors → Advanced → Developer mode
https://mcp.fastballapi.com/mcpCustom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs