How to get API Gateway function output from a step-function

Question

I have created step functions and invoked them as specified in AWS documentation. For output, I am getting

{ 

"executionArn": "arn:aws:states:us-east-1:123456789012:execution:HelloWorld:MyExecution", "startDate": 1486768956.878 

} 

But, instead of above response I want my step functions output. How to achive that?

Answer 1

First of all the step functions executes asynchronously and API Gateway is only capable of invoking the step function only. And they do not immediately return results. 

So, to get a function output from step function output, you actually need to create a new second method in API Gateway, which will call the Step Function with the DescribeExecution action. For more refer - step functions.