Connect
Sign in, copy your token, add it to your MCP config.
Invite-only pilot · MCP
Give your agent a phone line.
Your agent writes the brief, you approve it, CallAgent makes the call. You get the result back as text.
Approval before every callDiscloses it's an AINo audio recording
Agent
Hallo, ich rufe für Thomas Zebala an, ich bin übrigens eine KI. Es geht um einen Kontrolltermin.
Praxis
Moment, ich schau kurz nach.
Praxis
Donnerstag halb drei, oder Freitag früh.
Agent
Donnerstag 14:30 passt. Also Donnerstag, 14:30 Uhr.
Praxis
Genau, bis dann!
Termin bestätigtUhrzeit wiederholt
Works with any MCP client
Claude CodeClaude DesktopCodexCursor
Why CallAgent
Agents can book a flight. Calling the dentist is still on you.
Practices, tradespeople, small shops and public offices often only answer the phone. CallAgent lets your agent handle those calls too.
Real conversations
Low-latency speech that copes with interruptions, call screening and mailboxes.
Safe by default
Nothing dials before you approve. A hard time limit and an instant abort back that up.
Quick to set up
A remote MCP server with a bearer token. There's no SDK to install and no webhook to host.
01
02
Brief
Your agent writes the goal, the steps and the rules.
03
Approve
You check the plan. Nothing happens until you say yes.
04
Call
The voice agent calls, deals with screening and mailboxes, and works through your checklist.
05
Steer
If something comes up that the brief doesn't cover, it asks you. You can abort at any time.
06
Result
Outcome, facts, transcript and cost.
Integration
One command to connect.
Your agent works through three tools: prepare_call, approve_and_start and wait_for_call. Each tool description tells it what to do next.
terminal
claude mcp add --transport http callagent \ https://34.159.148.7.sslip.io/mcp \ --header "Authorization: Bearer cba_live_…" > Ruf beim Bäcker Huber an und frag, > ob sie Sonntag offen haben. prepare_call → plan ready approve_and_start → dialing +49 89 … wait_for_call → "So 7–12 Uhr geöffnet." ✓
Blog
From the Dial team
Vision
Call tool, not tool call: where voice agents go next
Today an agent asks a person to make the call. Soon the phone is just another tool, and then it becomes a channel agents use to reach each other.
Felix Huber · 8 Oct 2026
Developers
One block of config: why CallAgent feels boring to integrate
No SDK, no webhook server, no audio pipeline. What we left out on purpose, and why.
Mira Ostermaier · 1 Oct 2026
Engineering
From tool call to ringing phone: how CallAgent works
MCP in, PSTN out, a speech-to-speech model in between, and the four rules that keep a phone call from going wrong.
Lena Brandl · 24 Sep 2026
FAQ
Common questions
What's included in the free test call?
One real call to the number you register at sign-up. It runs the full flow (plan, approval, a conversation of up to four minutes, the result) and only counts if it connects.
Does the agent say it's an AI?
Yes, in every call. The brief can't turn this off.
Are calls recorded?
No. Audio is never saved. Text transcripts are visible only to you and are deleted after 7 days.
Which languages does it speak?
German and English. More languages are coming.
What if something goes wrong during a call?
Every call has a hard time limit, and you can abort it at any moment.
Where is my data processed?
On servers in Frankfurt. Twilio carries the phone line and OpenAI provides the voice model. Details are in the Datenschutzerklärung.