> For the complete documentation index, see [llms.txt](https://docs.calypso.money/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.calypso.money/get-started-with-calypso-api/webhook-subscriptions/sign-check.md).

# Sign check

Using our subscriptions, you can implement signature verification of responses.\
The necessary data is contained in the following headers:

| Key  | Value                                  |
| ---- | -------------------------------------- |
| Sign | The HEX-encoded signature (see below). |
| Key  | Public key used for identification     |

The secret key for webhook sign encryption is contained in the successful response body for the methods.

Change Webhook

Create Webhook

Get list of Webhook Subscriptions

Using the principle and examples from the article Get started with API you can encrypt the request body and compare the resulting hash with the corresponding header.

If there is a need to regenerate keys for signing webhooks, then you can use the following method

Regenerate Webhook Api keys


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