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0x vs VALR

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

API0xNEW—VALRNEW—
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 limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

0x vs VALR: common questions

Which is more reliable, 0x or VALR?

On our scheduled checks, VALR leads on measured uptime — 0x at —% versus VALR 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 0x and VALR need an API key?

0x needs no key, while VALR requires a free API key. If you want to start calling without signup, reach for 0x first.

Can I call 0x and VALR from the browser?

Only 0x is browser-friendly — it returns CORS headers over HTTPS. VALR needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are 0x and VALR free for commercial use?

0x has unclear commercial terms, and VALR 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.