Invoking lambda from API gateway test, but hitting the endpoint does not invoke the lambda. 500 returned

Question

I have an api gateway that triggers a lambda method. I'm trying to hit the endpoint and I get a 500 returned, InternalServerErrorException. However, the lambda was never invoked.

When logging into the aws console, I run the test interface in the api gateway. I get a 502, InternalServerErrorException. Logs say the lambda timed out after 3 seconds. Viewing cloudwatch it's clear the lambda was invoked this time.

I can't find any documentation on why I would be getting a 500 InternalServerErrorException when hitting the endpoint and it would not invoke the lambda, but I would be able to invoke it with the test button.

Any help would be greatly appreciated. I've been struggling for a bit with this one. Thanks!

Answer 1

If your API is working properly with the test button, but you are receiving this error, it looks like your API is not deployed.

To deploy your API, go to Actions > Deploy API: