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

# Start Campaigns From Webhooks

> Configure a continuous outbound campaign that receives contacts from an external webhook.

Use this setup when an external system should push contacts into Phonely in real time instead of uploading a CSV file.

## When To Use This Trigger

* Choose this option for continuous campaigns.
* Use it when leads arrive from a CRM, signup form, or backend service.
* Do not use it for one-time list uploads. Use CSV for that.

## Set Up The Webhook Trigger

1. Open `/campaign/{agentId}`.
2. Create or edit a campaign.
3. In the trigger step, choose a `Continuous` campaign and select `Webhook`.
4. Select the outbound call flow that should run for the campaign.
5. Copy the generated `Webhook URL`.
6. Send a sample `POST` request with JSON data.
7. Click `Update Fields` so Phonely can detect the payload fields.
8. Map the detected fields to the outbound variables used in the workflow.

## Example Payload

```json theme={null}
{
  "phone_number": "+15551234567",
  "first_name": "Jane",
  "appointment_id": "apt_123"
}
```

## Important Notes

* The receiver must send JSON with `POST`.
* Phonely updates the available field list only after a successful webhook test.
* If the payload shape changes later, run `Update Fields` again and review the variable mapping.
* Test the webhook before turning on production traffic.

## Rules

* ALWAYS confirm the payload includes the fields your workflow expects.
* NEVER launch the campaign before testing a sample webhook request.