GateCheck by LarryBuildsAI for ChatGPT

io.github.larrylemonbot/gatecheck

One-cent x402 and MCP readiness checks plus fixed-price marketplace launch packs.

client:ChatGPT transport:streamable-http tools:6

Install GateCheck by LarryBuildsAI in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://proofbeforepay.vercel.app/gatecheck/mcp

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