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Energy-Charts API vs RestoSignals

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

APIEnergy-Charts APIHEALTHY84RestoSignalsREACHABLE100
Uptime · 30d
Uptime · 90d97.2%100%
Uptime · 30d93.3%100%
P50 · ms633748
P95 · ms3072748
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified
Free tierFree — limits not published
Rate limitUnpublished
In directory since2026-07-052026-10-19
operationalpartialdownno data

Energy-Charts API vs RestoSignals: common questions

Which is more reliable, Energy-Charts API or RestoSignals?

On our scheduled checks, RestoSignals leads on measured uptime — Energy-Charts API at 97.2% versus RestoSignals 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, Energy-Charts API or RestoSignals?

Energy-Charts API has the lower median latency in our checks — Energy-Charts API responds in 633 ms versus RestoSignals at 748 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 RestoSignals need an API key?

Energy-Charts API needs no key, while RestoSignals 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 RestoSignals from the browser?

Only Energy-Charts API is browser-friendly — it returns CORS headers over HTTPS. RestoSignals needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Energy-Charts API and RestoSignals free for commercial use?

Energy-Charts API has unclear commercial terms, and RestoSignals 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.