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SampleAPIs vs VATlayer

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

APISampleAPIsHEALTHY94VATlayerHEALTHY93
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms471473
P95 · ms9842118
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limit5000 req/window · 3876 remaining · resets 1783516346Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

SampleAPIs vs VATlayer: common questions

Which is more reliable, SampleAPIs or VATlayer?

Both are neck-and-neck — SampleAPIs and VATlayer each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, SampleAPIs or VATlayer?

SampleAPIs has the lower median latency in our checks — SampleAPIs responds in 471 ms versus VATlayer at 473 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 SampleAPIs and VATlayer need an API key?

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

Can I call SampleAPIs and VATlayer from the browser?

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

Are SampleAPIs and VATlayer free for commercial use?

SampleAPIs has unclear commercial terms, and VATlayer 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.