Synchronous Invocation of AWS APIGATEWAY to a Step Function?

Question

We have created a simple step function in AWS , via synchronous invocation :

When I click "Start Execution", I do see that the flow is Synchronous , with the expected result:

However, When I attach this step function to a proxy APIGATEWAY via :

I do not see the expected result. I only see this :

Question:

How can I make the Apigateway to wait for the step function invocation (Synchronously) ?

I believe this answer might be helpful: https://stackoverflow.com/a/68687896/7661119 — Ervin Szilagyi, Oct 31 '21 at 08:10

score 1 · Accepted Answer · answered Oct 31 '21 at 08:29

In order to have a step function being invoked synchronously, you might need to use a Step Function with an Express workflow. On the API Gateway side you need an Integration Request with the Action set to StartSyncExecution.

This answer goes in-depth how to set-up the integration between the API Gateway and the Express Step Function: source

Synchronous Invocation of AWS APIGATEWAY to a Step Function?

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