Why set X-Amz-Target header for EventBridge integration?

Hello:

I believe you've already gotten a response via twitter, but the TL;DR is that not all AWS services behave the same. Some services do require you to explicitly map the X-Amz-Target header and others will work with the action header specified by API Gateway when configuring the integration.

Feedback from your twitter thread will be taken into account as we look at adding AWS service integrations to HTTP APIs.

Regards,
Bob