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IBM X-Force Exchange API vs Web of Science API Expanded

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

APIIBM X-Force Exchange APINEW—Web of Science API ExpandedNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

IBM X-Force Exchange API vs Web of Science API Expanded: common questions

Which is more reliable, IBM X-Force Exchange API or Web of Science API Expanded?

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

Do IBM X-Force Exchange API and Web of Science API Expanded need an API key?

Both ask you to authenticate — IBM X-Force Exchange API 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 IBM X-Force Exchange API and Web of Science API Expanded from the browser?

Neither sends browser-friendly CORS headers reliably, so call IBM X-Force Exchange API and Web of Science API Expanded from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are IBM X-Force Exchange API and Web of Science API Expanded free for commercial use?

IBM X-Force Exchange API 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.