JustOneAPI for ChatGPT

io.github.justoneapi-official/justoneapi

Discover social and commerce APIs without login; authenticate for API calls and account data.

client:ChatGPT transport:streamable-http

Install JustOneAPI in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mcp.justoneapi.com/mcp

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