The full upstream README, mirrored here for reference. Install config, tool schemas, adoption signals, and an original overview live on the AlterPhone MCP listing page.
Let your AI assistant make real phone calls.
AlterPhone MCP is a hosted Model Context Protocol server. Connect it to Claude, ChatGPT, Cursor, Claude Code or any other MCP client, and the assistant can dial a real phone number, hold a spoken conversation in one of 12 languages, and report back what was said: book or reschedule appointments, ask a business a question, negotiate, confirm an order, screen a caller, run a survey.
https://mcp.alterphone.app/mcp (Streamable HTTP)app.alterphone/phone-calls in the official MCP RegistryFull details, tools and supported countries: https://alterphone.app/mcp.html
Settings → Connectors → Add custom connector → enter https://mcp.alterphone.app/mcp → complete the sign-in.
Settings → Connectors → create a connector with the server URL https://mcp.alterphone.app/mcp → complete the sign-in. Custom MCP connectors require developer mode on your plan.
This package is a thin bridge for that case. It delegates to mcp-remote, which performs the browser sign-in, caches the tokens locally and forwards every message to the hosted server:
Requires Node.js 18 or newer. Set ALTERPHONE_MCP_URL to point the bridge at a different server.
| Tool | Description |
|---|---|
have_conversation | Dial a number and pursue an objective autonomously. Streams the transcript and returns the collected answers and a summary. The main tool. |
place_call | Dial a number, optionally with a greeting, for turn-by-turn control. |
speak_and_listen | Say something and return what the other party replied. |
listen | Wait for the other party to speak and return the transcript. |
hangup | End the call. |
get_balance | Read the prepaid credit balance. |
purchase_credits | Top up with the saved payment method, within a daily cap. |
Every tool carries readOnlyHint / destructiveHint annotations.
https://mcp.alterphone.app/.well-known/oauth-protected-resource; authorization server https://alterphone.app.calls:write, balance:read, credits:purchase.support@alterphone.app · Terms of service
MIT