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Catchdoms Security API vs serpstack

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

APICatchdoms Security APIHEALTHY93serpstackHEALTHY93
Uptime · 30d
Uptime · 90d100%99.02%
Uptime · 30d100%98.3%
P50 · ms437492
P95 · ms13981442
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Catchdoms Security API vs serpstack: common questions

Which is more reliable, Catchdoms Security API or serpstack?

On our scheduled checks, Catchdoms Security API leads on measured uptime — Catchdoms Security API at 100% versus serpstack 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, Catchdoms Security API or serpstack?

Catchdoms Security API has the lower median latency in our checks — Catchdoms Security API responds in 437 ms versus serpstack at 492 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 Catchdoms Security API and serpstack need an API key?

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

Can I call Catchdoms Security API and serpstack from the browser?

Neither sends browser-friendly CORS headers reliably, so call Catchdoms Security API 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 Catchdoms Security API and serpstack free for commercial use?

Catchdoms Security API 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.