The AlterPhone MCP server enables AI agents to place real phone calls and hold spoken conversations on behalf of users. It supports autonomous conversations for tasks like appointments and surveys, as well as turn-by-turn call control. The service uses a prepaid credit system and OAuth 2.1 authentication, allowing agents to dial numbers, listen, speak, and manage call sessions across multiple international destinations.
- Operator: AlterPhone
- Endpoint: https://mcp.alterphone.app/mcp
- Transport: streamable-http
- Sign-in: OAuth sign-in
- Category: Productivity and knowledge
- Use cases: Dial a number and let the voice agent pursue an objective autonomously; Drive a call turn by turn from the calling assistant with real-time speech-to-text; Read the balance and top up with a saved payment method
- Documentation: https://alterphone.app/llms.txt
- Directory listing: https://koskamo.com/explore/alterphone-mcp
- Also known as: AlterPhone MCP MCP; alterphone-mcp