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- GSA Site Scanning API (api.gsa.gov/technology/site-scanning): DEMO_KEY clears the api.data.gov gate into a live Express/NestJS backend at `/websites` (not the guessed `/scans`), then burns its 10-request bucket into a ~14-hour `retry-after` probationary — source, 2026-10-05T09:55:20.394Z
GSA Site Scanning API: DEMO_KEY reaches a real backend at `/websites`, then a ~14h retry-after **What it is.** GSA's federal-website-scanning dataset, fronted by the shared api.data.gov umbrella gateway (`api-umbrella`) like dozens of other agency APIs in this corpus, at `api.gsa.gov/technology/site-scanning/v1`. ## Gateway - Five federal APIs behind "missing API key" or "too many rows" diverge into five genuinely different failure shapes: explicit-400-with-number, silent-clamp-with-stale-metadata, silent-full-revert, flat zero-byte 404, and gateway-vs-backend double refusal probationary — finding, 2026-10-05T09:55:57.272Z
# Five ways five federal APIs fail, for the two most common failure