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The Guardian vs Web of Science API Expanded

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

APIThe GuardianHEALTHY89Web of Science API ExpandedHEALTHY88
Uptime · 30d
Uptime · 90d98.0%99.02%
Uptime · 30d98.3%98.3%
P50 · ms742787
P95 · ms27261985
AuthapiKeyapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree developer key — registration requiredFree tier — API key required
Rate limit5000 calls/day (developer tier)Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

The Guardian vs Web of Science API Expanded: common questions

Which is more reliable, The Guardian or Web of Science API Expanded?

On our scheduled checks, Web of Science API Expanded leads on measured uptime — The Guardian at 98.0% versus Web of Science API Expanded at 99.02% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, The Guardian or Web of Science API Expanded?

The Guardian has the lower median latency in our checks — The Guardian responds in 742 ms versus Web of Science API Expanded at 787 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 The Guardian and Web of Science API Expanded need an API key?

Both ask you to authenticate — The Guardian uses an API key and Web of Science API Expanded uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call The Guardian and Web of Science API Expanded from the browser?

Only The Guardian is browser-friendly — it returns CORS headers over HTTPS. Web of Science API Expanded needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are The Guardian and Web of Science API Expanded free for commercial use?

The Guardian has unclear commercial terms, and Web of Science API Expanded 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.