***

title: Calling
sidebarTitle: Overview
description: Make outbound calls with your AI agent.
----------------------------------------------------

The Atoms SDK lets you make outbound phone calls. Connect your AI agents to real phone conversations.

## What Can You Do?

| Capability         | Description                                            |
| ------------------ | ------------------------------------------------------ |
| **Outbound Calls** | Dial any phone number and connect it to your agent     |
| **Call Control**   | End calls or transfer to humans from within your agent |
| **Call Logs**      | Access transcripts, recordings, and analytics          |

## How It Works

```
Your App → SDK → Atoms Platform → Phone Network → User's Phone
                      ↓
                 Your Agent
```

1. **You initiate** — Call `start_outbound_call()` with a phone number
2. **Platform connects** — Atoms dials the number and establishes the call
3. **Agent handles** — Your agent runs the conversation in real-time
4. **You analyze** — Access transcripts and analytics afterward

## Prerequisites

Before making calls:

1. **API Key** — Get from [atoms.smallest.ai](https://atoms.smallest.ai)
2. **Agent** — Create an agent in the dashboard with a phone number linked
3. **Phone Numbers** — E.164 format (e.g., `+14155551234`)

## What's Next

<CardGroup cols={2}>
  <Card title="Outbound Calls" icon="phone-arrow-up-right" href="/atoms/developer-guide/build/calling/outbound-calls">
    Make individual calls with code examples.
  </Card>

  <Card title="Call Control" icon="phone-hangup" href="/atoms/developer-guide/build/calling/call-control">
    End calls and transfer to humans.
  </Card>
</CardGroup>