Attest for ChatGPT

io.github.attestagents/attest-mcp

Scan agent payment endpoints (x402, AP2, L402, MPP, 402) for a trust grade A-F before paying.

client:ChatGPT transport:streamable-http runtime:npm tools:2

Install Attest in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://attestagent.org/api/mcp

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