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APIs.guru vs ItsThisForThat

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

APIAPIs.guruHEALTHY97ItsThisForThatHEALTHY98
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms266242
P95 · ms1421555
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree and open, no keyFree — limits not published
Rate limitUnpublishedUnpublished (docs ask you not to hammer it)
In directory since2026-07-052026-07-05
operationalpartialdownno data

APIs.guru vs ItsThisForThat: common questions

Which is more reliable, APIs.guru or ItsThisForThat?

Both are neck-and-neck — APIs.guru and ItsThisForThat 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 ItsThisForThat?

ItsThisForThat has the lower median latency in our checks — APIs.guru responds in 266 ms versus ItsThisForThat at 242 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 ItsThisForThat need an API key?

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

Can I call APIs.guru and ItsThisForThat from the browser?

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

Are APIs.guru and ItsThisForThat free for commercial use?

APIs.guru has unclear commercial terms, and ItsThisForThat 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.