shipapis
StarSubmit an APISubmit API

Blockchain.info vs Kraken

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

APIBlockchain.infoHEALTHY95KrakenHEALTHY99
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms397155
P95 · ms870403
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Blockchain.info vs Kraken: common questions

Which is more reliable, Blockchain.info or Kraken?

Both are neck-and-neck — Blockchain.info and Kraken 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, Blockchain.info or Kraken?

Kraken has the lower median latency in our checks — Blockchain.info responds in 397 ms versus Kraken at 155 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 Blockchain.info and Kraken need an API key?

Neither needs a paid key — Blockchain.info is callable with no signup, and Kraken is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Blockchain.info and Kraken from the browser?

Yes — both Blockchain.info and Kraken 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 Blockchain.info and Kraken free for commercial use?

Blockchain.info has unclear commercial terms, and Kraken 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.