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Marketstack vs ValueRay

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

APIMarketstackHEALTHY93ValueRayHEALTHY94
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms470553
P95 · ms40681106
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree — limits not published
Rate limitUnpublished50 req/window · 49 remaining
In directory since2026-07-052026-07-05
operationalpartialdownno data

Marketstack vs ValueRay: common questions

Which is more reliable, Marketstack or ValueRay?

Both are neck-and-neck — Marketstack and ValueRay 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, Marketstack or ValueRay?

Marketstack has the lower median latency in our checks — Marketstack responds in 470 ms versus ValueRay at 553 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 Marketstack and ValueRay need an API key?

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

Can I call Marketstack and ValueRay from the browser?

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

Are Marketstack and ValueRay free for commercial use?

Marketstack has unclear commercial terms, and ValueRay 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.