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APIs.guru vs Notion

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

APIAPIs.guruHEALTHY97NotionREACHABLE100
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms266524
P95 · ms14213096
Authnoneoauth
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree and open, no keyOAuth — some read routes may be public
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

APIs.guru vs Notion: common questions

Which is more reliable, APIs.guru or Notion?

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

APIs.guru has the lower median latency in our checks — APIs.guru responds in 266 ms versus Notion at 524 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 Notion need an API key?

APIs.guru needs no key, while Notion requires OAuth. If you want to start calling without signup, reach for APIs.guru first.

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

Yes — both APIs.guru and Notion 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 APIs.guru and Notion free for commercial use?

APIs.guru has unclear commercial terms, and Notion 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.