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RSQ API vs Vector Express v2.0

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

APIRSQ APINEW—Vector Express v2.0NEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSnoyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree
Rate limitUnpublished5 req/window · 4 remaining · resets 1783513379
In directory since2026-07-052026-07-05
operationalpartialdownno data

RSQ API vs Vector Express v2.0: common questions

Which is more reliable, RSQ API or Vector Express v2.0?

On our scheduled checks, Vector Express v2.0 leads on measured uptime — RSQ API at —% versus Vector Express v2.0 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 RSQ API and Vector Express v2.0 need an API key?

Neither needs a paid key — RSQ API is callable with no signup, and Vector Express v2.0 is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call RSQ API and Vector Express v2.0 from the browser?

Neither sends browser-friendly CORS headers reliably, so call RSQ API and Vector Express v2.0 from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are RSQ API and Vector Express v2.0 free for commercial use?

RSQ API has unclear commercial terms, and Vector Express v2.0 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.