NumRadar for ChatGPT

app.numradar/mcp

Check whether phone numbers are registered on WhatsApp, from your AI agent.

client:ChatGPT transport:streamable-http runtime:npm

Install NumRadar in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://numradar.app/mcp

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