# Webhooks

Webhooks are user-configured HTTP callbacks that fire when an event occurs.

Configure them in Textline at [Settings → Tools & Integrations → Developer API → New Webhook](https://application.textline.com/organization/new_webhook).

More documentation: [support article](https://help.textline.com/en/articles/6660340).

### Signature validation

Each webhook request includes:

- `X-TGP-EVENT-SIGNATURE` — SHA256 signature
- `X-TGP-EVENT-TYPE` — webhook type
- `X-TGP-EVENT-TIME` — event time (unix seconds)

The signature is `SHA256(webhook_type + event_time + webhook_secret)` (concatenated, in that order). The webhook secret is on the API settings page.

## Operations

- [New Customer Post](https://reference.textline.com/operation/operation-new_customer_post.md)

- [New Outbound Post](https://reference.textline.com/operation/operation-new_outbound_post.md)

- [New Whisper](https://reference.textline.com/operation/operation-new_whisper.md)

- [Conversation Status Change](https://reference.textline.com/operation/operation-conversation_status_change.md)

- [Customer Updated](https://reference.textline.com/operation/operation-customer_updated.md)

- [User Status Change](https://reference.textline.com/operation/operation-user_status_change.md)


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