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# Webhooks overview

This section documents the payloads for Payabli's webhook notifications.

For more information about setting up webhooks, see the [Notifications and Reports overview](/guides/pay-ops-notifications-webhooks-overview).

### Send a 200 response

Your webhook server must send a 200 response when the payload is successfully received. If you send nothing, or anything other than a 200 response, Payabli assumes it has failed and the retry logic causes the payload to be sent several times.

### Response header

Each response payload has this header:

```curl Sandbox header
Content-Length: <content length>
Content-Type: application/json; charset=utf-8
Accept: */*
String: string
Host: 52.3.204.115
```

```curl Production header
Content-Length: <content length>
Content-Type: application/json; charset=utf-8
Accept: */*
String: string
Host: 54.166.54.170
```