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Httpbin vs Userstack

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

APIHttpbinNEW—UserstackNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
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

Httpbin vs Userstack: common questions

Which is more reliable, Httpbin or Userstack?

On our scheduled checks, Userstack leads on measured uptime — Httpbin at —% versus Userstack 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 Httpbin and Userstack need an API key?

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

Can I call Httpbin and Userstack from the browser?

Yes — both Httpbin and Userstack send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Httpbin and Userstack free for commercial use?

Httpbin has unclear commercial terms, and Userstack 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.