OnlyMCP for ChatGPT

com.only-mcp/onlymcp

Skills, agents and memory in the cloud, plus a gateway to your other MCP servers.

client:ChatGPT transport:streamable-http runtime:npm

Install OnlyMCP in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://only-mcp.com/api/mcp

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