keryx for ChatGPT

io.github.tang-vu/keryx

Autonomous research agent that pays every source it cites in USDC on Arc via x402 micropayments.

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

Install keryx in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://keryx.cc/mcp

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