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National Grid ESO vs THC Open Mindfulness Resources API

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

APINational Grid ESOHEALTHY96THC Open Mindfulness Resources APIHEALTHY80
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms1231596
P95 · ms13111957
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseNESO Open Data Licence (OGL-based); varies per dataset
Free tierFree — limits not published
Rate limitUnpublished
In directory since2026-07-052026-10-04
operationalpartialdownno data

National Grid ESO vs THC Open Mindfulness Resources API: common questions

Which is more reliable, National Grid ESO or THC Open Mindfulness Resources API?

Both are neck-and-neck — National Grid ESO and THC Open Mindfulness Resources API 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 THC Open Mindfulness Resources API?

National Grid ESO has the lower median latency in our checks — National Grid ESO responds in 123 ms versus THC Open Mindfulness Resources API at 1596 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 THC Open Mindfulness Resources API need an API key?

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

Can I call National Grid ESO and THC Open Mindfulness Resources API from the browser?

Yes — both National Grid ESO and THC Open Mindfulness Resources API send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are National Grid ESO and THC Open Mindfulness Resources API free for commercial use?

National Grid ESO has unclear commercial terms, and THC Open Mindfulness Resources 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.