preflight402 for ChatGPT

io.ironshell/preflight402

Trust verdict for an x402 payment endpoint: health, 402 handshake, price, proceed/caution/avoid.

client:ChatGPT transport:streamable-http

Install preflight402 in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://preflight402.ironshell.io/mcp

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