> For the complete documentation index, see [llms.txt](https://docs.sectoral.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sectoral.xyz/developer-api/webhooks.md).

# Webhook Endpoints

Create and manage webhook subscriptions programmatically so your systems hear about each settlement the moment it occurs. The list of events and the payload structure are documented in [Real-Time Event Stream](/ai-agents/event-stream.md).

***

## Create a subscription

```
POST /v1/webhooks
```

### Body

```json
{
  "url": "https://yourapp.com/hooks/sectoral",
  "events": ["transfer.confirmed", "agent.transaction.pending_approval"]
}
```

### Response

```json
{
  "webhook_id": "wh_2c9f1a",
  "url": "https://yourapp.com/hooks/sectoral",
  "events": ["transfer.confirmed", "agent.transaction.pending_approval"],
  "secret": "whsec_xxxxxxxxxxxxxxxxxxxx",
  "created_at": "2026-07-02T09:00:00Z"
}
```

You will only see the `secret` in this response. Use it to check the `X-Sectoral-Signature` header on incoming deliveries.

***

## List subscriptions

```
GET /v1/webhooks
```

***

## Delete a subscription

```
DELETE /v1/webhooks/{webhook_id}
```

Deletion is immediate, and the subscription receives no more deliveries.

***

## Checking signatures

Each delivery includes an `X-Sectoral-Signature` header containing an HMAC-SHA256 of the raw request body, computed with your secret. Verification needs only a short function:

```python
import hmac
import hashlib

def verify_signature(payload_bytes, signature_header, secret):
    expected = hmac.new(
        secret.encode(),
        payload_bytes,
        hashlib.sha256
    ).hexdigest()
    return hmac.compare_digest(expected, signature_header)
```

If a delivery doesn't pass this check, discard it without processing it.

***

## Resend an event

```
POST /v1/webhooks/{webhook_id}/replay/{event_id}
```

Useful when your endpoint had a short outage and you want a particular event delivered now instead of waiting for the next automatic retry.

***

## View delivery history

```
GET /v1/webhooks/{webhook_id}/deliveries
```

Shows a subscription's recent deliveries, including response codes and retry counts, so you can troubleshoot from the complete record instead of guessing.


---

# Agent Instructions
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```
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