AWS SigV4 requests with curl

Curl handles AWS Signature Version 4 API requests natively.

How to create AWS Signature Version 4 requests using curl

If an API Gateway is configured to use AWS IAM authorization, curl provides a seamless integration for HTTP requests.

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curl "$url" \
	--user "$AWS_ACCESS_KEY_ID":"$AWS_SECRET_ACCESS_KEY" \
	--aws-sigv4 "aws:amz:us-east-1:execute-api"

In the example, the $url links to a custom domain that points to an API Gateway.

The --user argument is given the $AWS_ACCESS_KEY_ID and $AWS_SECRET_ACCESS_KEY that links to the AWS IAM user.

The AWS service for invoking an API Gateway is execute-api. For curl, the full provider string is required:

--aws-sigv4 "aws:amz:region:service"