Blockchair vs CoinDCX
Same instrument, two spec sheets — measured, not claimed.
Blockchair vs CoinDCX: common questions
Which is more reliable, Blockchair or CoinDCX?
On our scheduled checks, Blockchair leads on measured uptime — Blockchair at 98.0% versus CoinDCX at 94.1% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, Blockchair or CoinDCX?
CoinDCX has the lower median latency in our checks — Blockchair responds in 729 ms versus CoinDCX at 190 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 Blockchair and CoinDCX need an API key?
Blockchair needs no key, while CoinDCX requires a free API key. If you want to start calling without signup, reach for Blockchair first.
Can I call Blockchair and CoinDCX from the browser?
Only Blockchair is browser-friendly — it returns CORS headers over HTTPS. CoinDCX needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Blockchair and CoinDCX free for commercial use?
Blockchair has unclear commercial terms, and CoinDCX 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.