> ## Documentation Index
> Fetch the complete documentation index at: https://docs.usebruno.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Authenticate using AWS Signature

AWS Signature is the authorization workflow for Amazon Web Services requests. AWS uses a custom HTTP scheme based on a keyed-HMAC (Hash Message Authentication Code) for authentication.

The official AWS Signature documentation provides more detail:

* [Signing and Authenticating Requests](https://docs.aws.amazon.com/AmazonS3/latest/userguide/RESTAuthentication.html)

* [How to call an API](https://docs.aws.amazon.com/apigateway/latest/developerguide/how-to-call-api.html)

To use AWS Signature, do the following:

1. In the `Auth` tab for a request, select `AWS Sig V4` from  dropdown list.

2. Enter your *AccessKeyID* and *SecretKey* values.

<Info>
  For extra security, integrate Bruno with your secret manager to store these values in a single location. Learn more [here](./../secrets-management/secret-managers/hashicorp-vault/overview).
</Info>

The AWS Signature parameters are as follows:

* Session Token - Required only when using temporary security credentials.
* Service Name - The service receiving the request.
* AWS Region - The region receiving the request.
* Profile Name - name of your AWS signing profile