How do I fetch one Google Ad Transparency creative?

Pass the public creative URL to GET /v1/google/ad-library/ads as the required url query param (the /advertiser/…/creative/… form on adstransparency.google.com). On a hit, data.lookupStatus is found and data.ad can include format, show dates, impression ranges, region stats, and creative variations. On a miss, lookupStatus is not_found and ad is null — still check meta.creditsCharged.