Cosign for ChatGPT
co.cosign/cosign
Find people, companies, and jobs; manage your professional network with Cosign.
client:ChatGPT
transport:streamable-http
Install Cosign in ChatGPT
Settings → Connectors → Advanced → Developer mode
https://api.cosign.co/mcpCustom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs