groundcheck for ChatGPT

io.github.beepboop2025/groundcheck

Verify claims, resolve FIGI identity, extract claims, and sign x402 delivery receipts over MCP.

client:ChatGPT transport:streamable-http runtime:npm tools:5

Install groundcheck in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://groundcheck.seiche.info/mcp

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