> For the complete documentation index, see [llms.txt](https://docs.digitalriver.com/digital-river-api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.digitalriver.com/digital-river-api/order-management/events-and-webhooks-1/webhooks/digital-river-signature.md).

# Digital River signature

You can include the Digital River signature if you want Digital River to sign the webhook events it sends to your endpoints. The signature will appear in each event's `DigitalRiver-Signature` header. You can use the signature to verify that Digital River sent the events, rather than a third party. You can use our libraries to verify signatures, or you can manually verify signatures.

The DigitalRiver-Signature is a header containing request signatures that are part of a webhook callback request. Each callback request generates a request signature based on the active "signing secrets" associated with a webhook. A signing secret, signature key, or token is a unique key associated with a webhook. When you rotate a key, the old key for the signing secret may stay around for a short time (12 hours).

Each token associated with an endpoint is unique. If you associate a test API key and a live API key with an endpoint, the token for each key is unique. You must get the token for each one if you use multiple endpoints. When you apply the tokens, Digital River can sign each webhook it sends to the endpoint.

To prevent replay attacks, Digital River includes a timestamp in the `DigitalRiver-Signature` header. The signed payload has a timestamp that is verified by the signature, so an attacker cannot change the timestamp without invalidating the signature. Your application can reject the payload if the signature is valid but the timestamp is too old.

We generate the timestamp and signature each time Digital River sends an event to your endpoint. When your endpoint replies with a non-2xx status code, Digital River will retry the event with a new signature and timestamp.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.digitalriver.com/digital-river-api/order-management/events-and-webhooks-1/webhooks/digital-river-signature.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.