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

# Signature Verification

Webhook signatures allow your server to verify that an event was sent by havl and was not modified in transit.

The production signing scheme will document the signature header, timestamp handling, canonical payload, and accepted clock tolerance. Verification should use the raw request body before JSON normalization.

Reject invalid signatures and old replayed timestamps before running application logic.

{% hint style="warning" %}
Never treat source IP filtering as a substitute for cryptographic signature verification.
{% endhint %}


---

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