Energy-Charts API vs The Guardian
Same instrument, two spec sheets — measured, not claimed.
Energy-Charts API vs The Guardian: common questions
Which is more reliable, Energy-Charts API or The Guardian?
On our scheduled checks, Energy-Charts API leads on measured uptime — Energy-Charts API at 97.2% versus The Guardian at 50.6% 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, Energy-Charts API or The Guardian?
The Guardian has the lower median latency in our checks — Energy-Charts API responds in 716 ms versus The Guardian at 517 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 Energy-Charts API and The Guardian need an API key?
Energy-Charts API needs no key, while The Guardian requires a free API key. If you want to start calling without signup, reach for Energy-Charts API first.
Can I call Energy-Charts API and The Guardian from the browser?
Only Energy-Charts API is browser-friendly — it returns CORS headers over HTTPS. The Guardian needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Energy-Charts API and The Guardian free for commercial use?
Energy-Charts API has unclear commercial terms, and The Guardian 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.