> ## Documentation Index
> Fetch the complete documentation index at: https://docs.agentcallback.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Post-call webhooks

> Send an HTTP request to your own systems after a call ends.

A post-call webhook sends an HTTP request to a URL you specify after a call ends, optionally only when the call matches conditions you define.

## Enable a webhook

<Steps>
  <Step title="Open the Post-call Webhook section">
    In your agent, open the **Post-call Webhook** section.
  </Step>

  <Step title="Turn it on">
    Enable the webhook.
  </Step>

  <Step title="Set the URL and method">
    Enter the URL to call, and choose `GET` or `POST`.
  </Step>
</Steps>

## Set trigger conditions

By default, a webhook fires for every call. You can restrict it to fire only when the call matches specific conditions.

Conditions are organized into trigger groups. Each group combines one or more conditions with `AND` or `OR`, and each condition compares a [state variable](/build-voice-agents/state-variables) or the [call outcome](/build-voice-agents/call-outcomes) against a value using `equals` or `not_equals`. The webhook fires as soon as any one trigger group matches.

For example, you could fire a webhook only when `call_outcome` equals `CALLBACK_REQUESTED`, or when a state variable like `escalated` equals `true`.

## Default payload

If you don't configure a custom payload, AgentCallback sends this JSON body:

```json theme={null}
{
  "callId": "...",
  "call_state": "...",
  "call_outcome": "...",
  "call_end_state": "...",
  "transfer_destination": "...",
  "call_summary": "...",
  "call_transcript": "...",
  "start_time": "...",
  "end_time": "...",
  "phone_number": "...",
  "contact_data": "...",
  "script_variables": "...",
  "requested_callback_at": "..."
}
```

## Customize the payload

You can define your own payload template using the same `{{name}}` interpolation and `{{#if}}...{{else}}...{{/if}}` conditionals available in your agent's prompt — see [Variables](/build-voice-agents/variables) for the syntax.

<Tip>
  Reference state variables in your custom payload with `{{state.variableKey}}`, just as you would in your agent's prompt.
</Tip>

## Check delivery results

After a call, the delivery result — whether the webhook was attempted, whether conditions matched, the response status code, and any error — is shown alongside the call's other details.

## Next steps

[Add your Twilio credentials](/phone-numbers/add-your-twilio-credentials) or [add your SIP trunk](/phone-numbers/add-your-sip) to connect a phone number to your agents.