call4me: the MCP server that makes phone calls

call4me is a hosted remote MCP server that places real phone calls for your AI agent. add https://call4.me/mcp to your agent (Streamable HTTP, sign in with Google or X), and call4me_place_call dials the business, a voice caller has the conversation, and call4me_get_call returns the live transcript and the outcome. calls cost $0.25 a minute from pickup, hold time half that, unanswered calls are free, and prepaid credits start at $10.00.

add it to your agent

claude code:     claude mcp add --scope user --transport http call4me https://call4.me/mcp   then /mcp → call4me → authenticate
codex:           codex mcp add call4me --url https://call4.me/mcp   then   codex mcp login call4me
chatgpt:         install the call4me plugin at https://chatgpt.com/plugins/plugin_asdk_app_6abdec89d46c81919cda058ca9f62cb8 and sign in
claude desktop / claude.ai:  settings → connectors → add custom connector → https://call4.me/mcp
can't sign in?   create a key at https://call4.me/account and use https://call4.me/mcp/<key>, or send "Authorization: Bearer <key>" to /mcp

or paste this prompt into your agent: it adds the server, checks the connection, and asks what your first call should do.

Set up call4me so you can make phone calls for me (book restaurants, doctor's appointments, call businesses for info).

1. Add the call4me MCP server and sign me in. Use whichever matches you:
   - Claude Code:  claude mcp add --scope user --transport http call4me https://call4.me/mcp  (then I run /mcp, pick call4me, and choose authenticate)
   - Codex:        codex mcp add call4me --url https://call4.me/mcp  then  codex mcp login call4me
   - ChatGPT: you can't install plugins from the chat, so give me this link to install the call4me plugin, then I sign in: https://chatgpt.com/plugins/plugin_asdk_app_6abdec89d46c81919cda058ca9f62cb8
   - Claude Desktop or claude.ai: add a custom connector with the URL https://call4.me/mcp and sign in when it asks.
   - Muse: build a custom integration to the call4me remote MCP server at https://call4.me/mcp (streamable HTTP) with the official MCP SDK. Ask me for my call4me API key (it's at https://call4.me/account) through your secure credential flow, never in chat, store it in your Secure Credentials Store, and send it as Authorization: Bearer <key>. List the tools, test call4me_get_balance, and save it as a reusable skill.
   - Grok Bot: add a custom MCP server called call4me (remote HTTPS, no headers, no auth) at my personal server URL, which I copy from https://call4.me/account. You add it from this chat; no separate approval is needed. If you offer sign-in instead, use https://call4.me/mcp and I sign in.
   - grok.com: you can't add connectors from the chat, so I do it: grok.com/connectors, New Connector, Custom, with the URL https://call4.me/mcp, then I sign in.
   - If you can't sign me in, I copy my personal server URL from https://call4.me/account and you use that instead.
   I sign in with Google or X. If I have no credits yet, I load some at https://call4.me (from $10).

2. Restart or reload MCP servers if needed, then call call4me_get_balance to check it works. Show me my assigned call4me numbers from the returned numbers list, with their countries, and ask me to save them as a contact named call4me, so my phone's call screening or spam filter lets them ring through (a screener that answers for me gets put on the business call instead of me). These are the numbers call4me calls from, separate from my own phone saved in my calling profile. If phone_number is null and the numbers list is empty, explain that my free US number is assigned on my first call and you'll show it to me then. Don't invent a number or claim one has already been assigned. Explain that call4me may ring my saved phone when a business needs me to verify my identity. I am on the call as soon as I answer; pressing * or hanging up hands the call back to the caller. I can also ask to just listen in on a call (listen_in on call4me_place_call, or mode "listen" on call4me_connect_me): nobody hears me, and I press 1 to take over.

3. Ask what I want my first call to accomplish. Don't collect a personal profile during setup. For a specific call, use call4me_get_profile to see what's already saved and call4me_get_requirements for that category. Ask in one message only for missing details that call needs. Ask for sensitive details such as date of birth, home address, insurance IDs or VIN only when that specific call requires them, and explain why. Giving a detail for one call does not mean I want it saved: offer call4me_save_profile for details I want reused and save only with my agreement. Skip anything I decline. Never ask for or save my Social Security number, card numbers, or passwords.

4. From now on, when I ask you to call somewhere:
   - Pick the category and call call4me_get_requirements. Ask me for every required detail you don't already have in one message before dialing (reason for the visit, new or existing patient, which days/times work, party size...). The caller can only say what you give it.
   - Find the number (web search if needed) and make sure it's the right location.
   - Before placing a call with connect_when, give me a heads up that my phone may ring and show the actual call4me number that will ring me. Use the assigned number selected for this call, which can differ by country. If this is my first call and no number is assigned yet, explain that before dialing and show the exact returned calling_number as soon as call4me_place_call returns.
   - Place the call with call4me_place_call. On my first call, or whenever its returned calling_number differs from the one you've already shown me, show me that exact number and suggest saving it as a call4me contact. Then keep calling call4me_get_call until it finishes. If the caller asks a question mid-call, answer it quickly with call4me_answer_question; the business is waiting on the line.
   - Before using call4me_connect_me, give me a heads up with that call's actual calling_number from call4me_get_call. Remind me that I'm on the call as soon as I answer, and I press * or hang up to hand the call back. Don't use my saved profile phone as the caller number.
   - Tell me the result in one or two lines.

when call4me calls you

your free us number is assigned on your first call. your agent will show you the number to save as a contact named call4me once the call starts. save it before a call that may ring you: phones that screen unknown callers answer in your place.

call4me may ring your personal phone if a business needs you to verify your account, or if you ask to join the call. your personal phone is the number you save in your calling profile, separate from your call4me number. your agent should give you a heads up before a call that may need you and before connecting you.

you're on the call as soon as you answer. press * or hang up to hand the call back to the assistant.

tools

call4me_get_requirements what a kind of call needs before it dials (a restaurant booking, a dentist visit, a question for a business...)
call4me_place_call call a business with a goal, the facts it may share, and what it may accept
call4me_get_call status, live transcript, open questions, outcome (long-polls with wait_seconds)
call4me_answer_question answer something the business asked mid-call
call4me_connect_me ring your phone and put you on the call, or let you listen in
call4me_hang_up end a call early
call4me_schedule_call dial at a set time; call4me_cancel_scheduled_call calls it off
call4me_list_calls scheduled and recent calls, including callbacks your number answered
call4me_get_recordings the recording of a finished call
call4me_get_balance balance, price per minute, and your call4me phone numbers
call4me_add_funds a checkout link that adds credits now and reloads the same amount every month

plus call4me_get_profile and call4me_save_profile for details you reuse, call4me_get_usage, and number tools (call4me_list_numbers, call4me_buy_number, call4me_release_number, call4me_verify_number).

from your own code

the same calls are a REST API, for an agent you wrote yourself. send your key from my account as a Bearer token, then follow the call until finished is true. a 422 "Not calling yet" lists what the call still needs. the full spec is /openapi.json.

curl https://call4.me/api/calls   -H "Authorization: Bearer $CALL4ME_API_KEY"   -H "Content-Type: application/json"   -d '{"to": "+14155550123", "business": "Nopa", "category": "general",
       "goal": "Ask whether they take walk-ins for 2 tonight",
       "details": {"questions": "Do you take walk-ins for 2 tonight? How long is the wait?"}}'

curl "https://call4.me/api/calls/<id>?wait_seconds=30" -H "Authorization: Bearer $CALL4ME_API_KEY"

tested guides for agent frameworks: OpenAI Agents SDK, Claude Agent SDK, Vercel AI SDK, LangChain and Mastra. to compare calling MCP servers, read the phone calling MCP comparison.