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National Grid ESO vs Solematica

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

APINational Grid ESOHEALTHY92SolematicaHEALTHY96
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms609267
P95 · ms13111414
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseNESO Open Data Licence (OGL-based); varies per datasetUnverified
Free tierFree — limits not publishedFree public /providers endpoint; other endpoints need paid credits
Rate limitUnpublished100 req/window · 99 remaining · resets 900
In directory since2026-07-052026-07-05
operationalpartialdownno data

National Grid ESO vs Solematica: common questions

Which is more reliable, National Grid ESO or Solematica?

Both are neck-and-neck — National Grid ESO and Solematica each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, National Grid ESO or Solematica?

Solematica has the lower median latency in our checks — National Grid ESO responds in 609 ms versus Solematica at 267 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 National Grid ESO and Solematica need an API key?

Neither needs a paid key — National Grid ESO is callable with no signup, and Solematica is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call National Grid ESO and Solematica from the browser?

Only National Grid ESO is browser-friendly — it returns CORS headers over HTTPS. Solematica needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are National Grid ESO and Solematica free for commercial use?

National Grid ESO has unclear commercial terms, and Solematica 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.