I am currently building a Data Action that needs to authenticate with a custom AWS Lambda function using ‘AWS Signature Version 4’. I have configured the ‘AWS IAM’ credential in Genesys Cloud, but the Data Action keeps returning a ‘403 Forbidden’ error with a message saying ‘The request signature we calculated does not match the signature you provided’. I suspect that the ‘Query Parameters’ I am sending in the Data Action are not being included correctly in the signature calculation. How can I ensure that all my dynamic parameters are properly signed by the Genesys Cloud credential engine?
Greetings! I am a Microsoft Teams integrator and I have worked with many AWS-based Data Actions. When you use AWS Signature V4, every part of the request (headers, body, and query parameters) must be included in the signature. If you are adding ‘Dynamic’ query parameters in the Data Action configuration, make sure they are defined in the ‘Input Contract’ and not just hard-coded in the URL. Genesys Cloud only signs the parameters that it knows about from the input contract!
I have seen this signature issue pop up in our user group meetings several times. To follow up on Ann14, another common culprit is the ‘Content-Type’ header. AWS is very picky about the case-sensitivity of the headers. If your Data Action sends application/json but AWS expects Application/Json, the signature will fail. I always recommend using the ‘JSON’ button in the Data Action tester to see the exact raw request that is being sent to AWS. It is the best way to debug these signature mismatches!