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GitHub REST API vs Userstack

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

APIGitHub REST APIHEALTHY90UserstackHEALTHY93
Uptime · 30d
Uptime · 90d100%99.02%
Uptime · 30d100%98.3%
P50 · ms568443
P95 · ms26713029
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

GitHub REST API vs Userstack: common questions

Which is more reliable, GitHub REST API or Userstack?

On our scheduled checks, GitHub REST API leads on measured uptime — GitHub REST API at 100% versus Userstack at 99.02% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, GitHub REST API or Userstack?

Userstack has the lower median latency in our checks — GitHub REST API responds in 568 ms versus Userstack at 443 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do GitHub REST API and Userstack need an API key?

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

Can I call GitHub REST API and Userstack from the browser?

Yes — both GitHub REST API 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 GitHub REST API and Userstack free for commercial use?

GitHub REST API 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.