x402 Preflight for ChatGPT

io.github.chico10117/x402-preflight

Check an x402 endpoint's payment challenge and discovery metadata before paying.

client:ChatGPT transport:streamable-http tools:3

Install x402 Preflight in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://x402.chikocorp.com/mcp

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