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APIs.guru vs RSQ API

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

APIAPIs.guruHEALTHY97RSQ APIHEALTHY91
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms266783
P95 · ms14211387
Authnonenone
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree and open, no keyFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

APIs.guru vs RSQ API: common questions

Which is more reliable, APIs.guru or RSQ API?

Both are neck-and-neck — APIs.guru and RSQ 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, APIs.guru or RSQ API?

APIs.guru has the lower median latency in our checks — APIs.guru responds in 266 ms versus RSQ API at 783 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 APIs.guru and RSQ API need an API key?

Neither needs a paid key — APIs.guru is callable with no signup, and RSQ API is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call APIs.guru and RSQ API from the browser?

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

Are APIs.guru and RSQ API free for commercial use?

APIs.guru has unclear commercial terms, and RSQ 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.