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Federal Register vs PermisAPI

Same instrument, two spec sheets — measured, not claimed.

APIFederal RegisterNEW—PermisAPINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licenseUS Government work — public domainUnverified
Free tierFree — no key or signup requiredFree tier — API key may be required for production
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Federal Register vs PermisAPI: common questions

Which is more reliable, Federal Register or PermisAPI?

On our scheduled checks, PermisAPI leads on measured uptime — Federal Register at —% versus PermisAPI at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Federal Register and PermisAPI need an API key?

Federal Register needs no key, while PermisAPI requires a free API key. If you want to start calling without signup, reach for Federal Register first.

Can I call Federal Register and PermisAPI from the browser?

Only Federal Register is browser-friendly — it returns CORS headers over HTTPS. PermisAPI needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Federal Register and PermisAPI free for commercial use?

Federal Register allows commercial use on its free tier, and PermisAPI has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.