TinyFn for ChatGPT
io.tinyfn/tinyfn
500+ deterministic tools for AI agents: math, conversion, validation, hashing, encoding, date/time.
client:ChatGPT
transport:streamable-http
tools:500
Install TinyFn in ChatGPT
Settings → Connectors → Advanced → Developer mode
https://api.tinyfn.io/mcp/all/Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs