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SearchApi vs serpstack

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

APISearchApiNEW—serpstackNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

SearchApi vs serpstack: common questions

Which is more reliable, SearchApi or serpstack?

On our scheduled checks, serpstack leads on measured uptime — SearchApi 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 SearchApi and serpstack need an API key?

Both ask you to authenticate — SearchApi uses an API key and serpstack uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call SearchApi and serpstack from the browser?

Neither sends browser-friendly CORS headers reliably, so call SearchApi and serpstack from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are SearchApi and serpstack free for commercial use?

SearchApi 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.