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English Random Words vs serpstack

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

APIEnglish Random WordsNEW—serpstackNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limit30 req/window · 6 remaining · resets 585Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

English Random Words vs serpstack: common questions

Which is more reliable, English Random Words or serpstack?

On our scheduled checks, serpstack leads on measured uptime — English Random Words at —% versus serpstack 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 English Random Words and serpstack need an API key?

English Random Words needs no key, while serpstack requires a free API key. If you want to start calling without signup, reach for English Random Words first.

Can I call English Random Words and serpstack from the browser?

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

Are English Random Words and serpstack free for commercial use?

English Random Words has unclear commercial terms, and serpstack 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.