AWS API-Gateway communicating to SNS

Question

I am building an API which will be serviced by Lambda functions but I need these to be asynchronous so rather than connecting the API-Gateway directly to the Lambda function

Answer 1

Also remember parameters are case sensitive; I also received the OP's error: "Message": "Invalid parameter: TopicArn or TargetArn Reason: no value for required parameter"

The only problem was case sensitivity of the parameters (specifically it should be: "TopicArn" and "Message"). These are set in the Method Execution | POST - Integration Request section, in the "Name" field.

The capitalization of the "Mapped from" is important that it matches the params being sent through from the Method Request configuration, but what is sent on to SNS is the "Name" field of "Integration Request", and that is what I had wrong.