Gavel MCP by usefulapi for ChatGPT

io.usefulapi/gavel

List workflows and variables; create sessions and list session documents in Gavel.

client:ChatGPT transport:streamable-http tools:4

Install Gavel MCP by usefulapi in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://gavel.usefulapi.io/mcp

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