Datamuse vs Registrum API
Same instrument, two spec sheets — measured, not claimed.
Datamuse vs Registrum API: common questions
Which is more reliable, Datamuse or Registrum API?
On our scheduled checks, Registrum API leads on measured uptime — Datamuse at 92.2% versus Registrum API at 100% 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, Datamuse or Registrum API?
Datamuse has the lower median latency in our checks — Datamuse responds in 180 ms versus Registrum API at 246 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 Datamuse and Registrum API need an API key?
Datamuse needs no key, while Registrum API requires a free API key. If you want to start calling without signup, reach for Datamuse first.
Can I call Datamuse and Registrum API from the browser?
Neither sends browser-friendly CORS headers reliably, so call Datamuse and Registrum API from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are Datamuse and Registrum API free for commercial use?
Datamuse has unclear commercial terms, and Registrum API 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.