call4me: Give your AI agent one new tool: make a phone call

call4me lets Claude, Codex, ChatGPT and any MCP agent call businesses for you. It navigates phone trees and hold music, handles the conversation, asks you when it needs help, takes callbacks, and returns the result, transcript and recording.

Hey Product Hunt! Since our October 8 launch, we've refreshed call4me's design and our user base has tripled. The bigger change is what you can build with it. Inbound calls now support saved standing answering instructions, so your call4me number can handle incoming calls and permitted keypad choices. Developers can integrate directly through the new REST API alongside MCP, and agents can fund and place calls through x402. We've also improved Spanish phone menus, long holds and transfers, and added Vesper and Willow voices. It still works with Claude, ChatGPT, Codex, Cursor and other MCP clients to handle calls to businesses and return the result and transcript. Hear real calls: https://call4.me/examples Connect your agent: https://call4.me/mcp Build with the API: https://call4.me/openapi.json What would you want your assistant to make or answer a call about?

If someone calls and requests something that is not in my saved instructions, can the agent take a message and I can look at it later? I’d want it not to agree to anything on my behalf.

Keep standing instructions locked to one goal per call. If you let an agent handle open-ended conversations over the phone, transcripts get bloated and parsing fails downstream.

If someone calls and requests something that is not in my saved instructions, can the agent take a message and I can look at it later? I’d want it not to agree to anything on my behalf.

Keep standing instructions locked to one goal per call. If you let an agent handle open-ended conversations over the phone, transcripts get bloated and parsing fails downstream.