No direct endpoint to query this, but you can follow the advice in this post (specifically the second screenshot) to download a copy of each deploy and diff them:
Just to confirm the steps to reproduce this: did you get this error when you clicked the icon to download a copy of the deploy? If so, my first question is whether there might be browser extensions interfering?
Hi, so those api endpoints probably won’t work in the browser (more info about CORS here: Cross-Origin Resource Sharing (CORS) - HTTP | MDN). If you try your API call in a curl or a netlify lambda function, things should work without running into the CORS issue.