# Headers

In all requests for all actions (except `ping` action) two headers will be sent:

<table><thead><tr><th width="186">Attribute</th><th width="536">Description</th></tr></thead><tbody><tr><td><code>timestamp</code></td><td>The unix time stamp</td></tr><tr><td><code>signature</code></td><td>Signature of incoming request body and secret key (HMAC)</td></tr></tbody></table>

By checking signature in request you may confirm that the webhook came from us.

Detailed info about how to calculate signature may be found on [signature](https://developer.betstack.io/pam-platform-api/signature "mention") page.