Phonekit for ChatGPT

io.phonekit/phonekit

Real US numbers, including real SIM lines, so agents and tests can read codes from your own app.

client:ChatGPT transport:streamable-http

Install Phonekit in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://www.phonekit.io/api/mcp

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