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Diffbot API vs Not Human Search

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

APIDiffbot APIUNMONITORED—Not Human SearchNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key may be required for productionFree — no key for read endpoints (paid API-key plans offered)
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Diffbot API vs Not Human Search: common questions

Which is more reliable, Diffbot API or Not Human Search?

Only Not Human Search is on our probe schedule so far (—% uptime over 90 days). The other is catalogued but not yet live-checked, so we can't compare measured reliability head-to-head — check the uncovered API's own status page for now.

Do Diffbot API and Not Human Search need an API key?

Not Human Search needs no key, while Diffbot API requires a free API key. If you want to start calling without signup, reach for Not Human Search first.

Can I call Diffbot API and Not Human Search from the browser?

Yes — both Diffbot API and Not Human Search 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 Diffbot API and Not Human Search free for commercial use?

Diffbot API has unclear commercial terms, and Not Human Search 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.