"My automation broke but I only changed the inputs"

When code didn't change but a run started failing, work in this order — authentication first, then connectivity:

1. Auth first. Point the HTTP tool at the API endpoint. 401/403 means the credentials/token are the problem — expired, rotated, or wrong for the new inputs. 200/2xx means auth is fine; move on.

2. Then connectivity. If auth is good but calls still fail, confirm you can actually reach the host: Ping and Path ping the API's hostname, and check IPv4 vs IPv6 (the new input may resolve to an address family that's filtered).

3. Re-run only after both pass. If auth succeeds and connectivity is clean, the failure is almost certainly in the inputs/data itself — validate the changed values.

Tip: key/cert rotation is a classic culprit — check the SSL inspector's "days remaining" and whether a token was rotated out from under the job.