CallMeMCP is a mobile application that enables AI agents to contact users through standard phone calls. Its primary function is to facilitate asynchronous human oversight of autonomous agents. When an agent requires a decision or input, it initiates a phone call to the user. The user hears the query read aloud and responds verbally. The application converts the spoken response into text and delivers it back to the agent, allowing the task to proceed. The setup process involves downloading the application from the App Store or Google Play to receive a private ten-digit number. This number is provided to the AI agent with instructions to call when a decision is needed. The application works with any MCP client, including Claude Code, Codex, Cursor, and ChatGPT. No account creation or API key is required. Each agent session receives its own conversation thread, and calls can convey up to 2,000 characters of information. The application supports text replies and follow-ups for missed calls. CallMeMCP uses the device's native call interface and operates over Wi-Fi or mobile data without requiring a SIM card or carrier service. It is available for iPhone with iOS 17 or later and Android 8 or later. The application does not record calls; only text transcripts are retained. Users can delete their number and associated data at any time. The service is available through a subscription model. It is designed for users who run long tasks with AI agents and need to be reachable for critical decisions without remaining at their workstation.