Debugging an API Integration

The small utilities you actually reach for while tracking down why an API call isn't behaving.

This isn't a strict sequence so much as the actual order a real debugging session tends to go: first confirm what the status code genuinely means (a surprising number of bugs turn out to be a misunderstood status code, not a real failure), then make the raw response readable enough to actually look at, then check whether an auth token is the real problem, then compare expected versus actual response line by line once you know roughly where to look.

Each step opens as its own tool -- download from one, upload into the next, same as any free tool on the site.