What is Call Me?
Call Me, from the Norwegian developer Serdar Oztetik, gives a coding agent a way to reach you when you are away from the keyboard. You install the /call-me app, which assigns you a random 10-digit number that exists only inside the app; an agent then calls a tool on the hosted server at https://callmemcp.com/mcp, your phone rings like a normal call, a synthetic voice reads the question and your reply comes back to the agent as a transcript. It can also send push-notification texts, keep a call open for a back-and-forth, and collect replies and voicemails later.
The server exposes seven tools (call, say, hang_up, poll_result, text, wait_for_reply and set_thread_title) over streamable HTTP with no API key or OAuth; the same service answers plain curl requests. The GitHub repository (MIT, about 44 stars) holds the Claude Code, Codex, Cursor, Gemini CLI and Grok plugins, a local Codex MCP server and an n8n template. The calling service and apps are closed and need a subscription after a trial.
How to install Call Me
https://callmemcp.com/mcpIs Call Me worth it?
Call Me solves a narrow, real problem: an agent stops to ask a question and you are not at the desk. The Claude Code plugin goes further than the bare MCP server, with a Stop hook that rings or texts you when a turn ends on an unanswered question and puts your reply back into the live session. A call reads up to 2,000 characters, about two minutes of speech, and keep_open turns it into a conversation that hangs up after 2 minutes of silence, 15 minutes in total or 60 turns.
The security model is the first thing to understand. There is no authentication on the hosted endpoint: whoever has your number can ring you or text you, whether that is your agent, a colleague's agent or a script someone pasted. The number cannot read your history or act for you, and the server caps rings at 20 an hour and 60 a day per IP address and 10 an hour and 40 a day to any one number. A thread you block in the app returns 'missed' to the sender, indistinguishable from an unanswered phone.
The other half of that model is what the agent does with your answer. A spoken 'yes, ship it' arrives as plain text with nothing to prove who said it, so whoever picks up your phone can approve a deploy. Nothing in the MCP server asks for a second confirmation; that has to live in the agent's own permission settings.
The data path runs through several companies. According to the privacy policy, effective 12 November 2026, the service is hosted on AWS; ElevenLabs does speech-to-text and text-to-speech, with AWS Polly and Transcribe as back-up; and Claude Haiku on Amazon Bedrock writes short holding replies while your agent thinks. Call audio is not stored, but message text and transcripts are kept for as long as your number exists, and the policy says its ElevenLabs plan does not offer zero retention. Android pushes carry the caller's label and the first line of the question through Firebase.
Price and maturity complete the picture. The app reached the App Store in July 2026 and version 1.6.9 in November, with the plan line-up still moving: version 1.6.7 added monthly and yearly plans beside the original weekly one. At $84.99 a year it is cheap compared with building the same thing on a telephony API, but the service has no named uptime commitment and its terms say it must not be used for emergencies.
Where it earns its place
A freelance developer running Claude Code overnight on a refactor
Answer the agent's blocking questions without sitting at the laptop
Install the plugin; when a turn ends on a question the Stop hook rings the phone, the answer goes back into the session and work resumes. One subscription covers it; set the agent to ask before any destructive step regardless.
A platform engineer on a three-person team
Get a spoken go or no-go before a nightly migration runs
Call the /ring endpoint from the job with a short question and a 300-second timeout, and abort on anything but a clear yes. Treat a missed or declined status as no, since the service promises no delivery time.
An operations lead automating approvals in n8n
Approve purchase requests by phone while travelling
Start from the approve-by-phone template in the repository, which rings the number and branches on the transcript. Keep the threshold low enough that a wrong person answering costs little.
Before you commit
- Setup
- Install the iPhone (iOS 17+) or Android (8+) app, agree to the terms and note the number it shows; then add https://callmemcp.com/mcp as an HTTP server in your client, or install the Claude Code plugin and enable it, which install leaves disabled.
- Integrations
- Seven MCP tools; plugins for Claude Code, Codex, Cursor, Gemini CLI, Grok, DeepSeek Harness, herdr and Omarchy; a REST API with /ring and /text; an n8n template.
- Data and privacy
- Hosted on AWS; ElevenLabs handles speech with AWS Polly and Transcribe as back-up; Claude Haiku on Bedrock writes holding replies. Audio is not stored; texts and transcripts stay until you delete the number in the app. The policy says data is not used for training.
- Cost at scale
- One subscription per phone: $19.90, Weekly $4.99 or Yearly $84.99 on the US App Store. There is no per-call charge in the published terms; rate limits cap use instead.
- Limits
- 20 rings an hour and 60 a day per IP, 10 an hour and 40 a day to one number; 2,000 characters per message; open calls end after 2 minutes of silence, 15 minutes or 60 turns. Not for emergency calls.
What’s good
- Rings a real phone; no SIM, carrier or API key
- Claude Code plugin wakes the session with your reply
- Voice transcripts in many languages; texts when a call is too much
- Block any sender thread for good from the app
What’s not
- No authentication: the number alone reaches you
- Spoken approvals carry no proof of who answered
- Transcripts kept server-side; ElevenLabs retention not zero
- Closed service with a subscription after a 3-day trial
Best for
Solo developers running long agent sessions who want questions and approvals to follow them to their phone.
Call Me alternatives
Call Me: common questions
- Is Call Me worth it?
- A neat way to approve an agent's next step from a walk, as long as you accept that your 10-digit number is the only thing standing between a stranger and your phone. We rate it 3.6 out of 5.
- How much does Call Me cost?
- Plugins and client code free (MIT). The /call-me app needs a subscription: the US App Store lists /call-me at $19.90, Weekly at $4.99 and Yearly at $84.99; the monthly plan starts with a 3-day free trial for new subscribers.
- What are the downsides of Call Me?
- No authentication: the number alone reaches you; spoken approvals carry no proof of who answered; transcripts kept server-side; ElevenLabs retention not zero; closed service with a subscription after a 3-day trial.
- Who is Call Me best for?
- Solo developers running long agent sessions who want questions and approvals to follow them to their phone.
- How much does Call Me cost for a team or in production?
- One subscription per phone: $19.90, Weekly $4.99 or Yearly $84.99 on the US App Store. There is no per-call charge in the published terms; rate limits cap use instead.
- Is Call Me safe for company data?
- Hosted on AWS; ElevenLabs handles speech with AWS Polly and Transcribe as back-up; Claude Haiku on Bedrock writes holding replies. Audio is not stored; texts and transcripts stay until you delete the number in the app. The policy says data is not used for training.
- What are the best Call Me alternatives?
- The closest alternatives we have reviewed are PlaceCall, Slack MCP Server and AgentMail.
Answers checked Nov 13, 2026.