Datamuse vs Energy-Charts API
Same instrument, two spec sheets — measured, not claimed.
Datamuse vs Energy-Charts API: common questions
Which is more reliable, Datamuse or Energy-Charts API?
On our scheduled checks, Energy-Charts API leads on measured uptime — Datamuse at 37.1% versus Energy-Charts API at 97.2% 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 Energy-Charts API?
Datamuse has the lower median latency in our checks — Datamuse responds in 160 ms versus Energy-Charts API at 716 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 Energy-Charts API need an API key?
Neither needs a paid key — Datamuse is callable with no signup, and Energy-Charts API is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Datamuse and Energy-Charts API from the browser?
Only Energy-Charts API is browser-friendly — it returns CORS headers over HTTPS. Datamuse needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Datamuse and Energy-Charts API free for commercial use?
Datamuse has unclear commercial terms, and Energy-Charts 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.