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HTTP Dog vs Open Dog Registry

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

APIHTTP DogNEW—Open Dog RegistryNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

HTTP Dog vs Open Dog Registry: common questions

Which is more reliable, HTTP Dog or Open Dog Registry?

On our scheduled checks, Open Dog Registry leads on measured uptime — HTTP Dog at —% versus Open Dog Registry 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 HTTP Dog and Open Dog Registry need an API key?

HTTP Dog needs no key, while Open Dog Registry requires a free API key. If you want to start calling without signup, reach for HTTP Dog first.

Can I call HTTP Dog and Open Dog Registry from the browser?

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

Are HTTP Dog and Open Dog Registry free for commercial use?

HTTP Dog has unclear commercial terms, and Open Dog Registry 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.