stamp for ChatGPT

io.github.theoddden/stamp

Concierge MCP for agentic workflows: verified time + drift, uuid, diff, calc, attest, verify.

client:ChatGPT transport:streamable-http runtime:pypi tools:6

Install stamp in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://stamp-mcp.terradev.cloud/mcp

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