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ES·pera API vs Squiggle

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

APIES·pera APIDYING37SquiggleDEAD0
Uptime · 30d
Uptime · 90d0.0%0.0%
Uptime · 30d0.0%0.0%
P50 · ms——
P95 · ms——
Authnonenone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified
Free tierFree — no key
Rate limitUnpublished
In directory since2026-09-212026-07-05
operationalpartialdownno data

ES·pera API vs Squiggle: common questions

Which is more reliable, ES·pera API or Squiggle?

Both are neck-and-neck — ES·pera API and Squiggle each measure 0.0% 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.

Do ES·pera API and Squiggle need an API key?

Neither needs a paid key — ES·pera API is callable with no signup, and Squiggle is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call ES·pera API and Squiggle from the browser?

Neither sends browser-friendly CORS headers reliably, so call ES·pera API and Squiggle from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are ES·pera API and Squiggle free for commercial use?

ES·pera API has unclear commercial terms, and Squiggle 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.