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iTunes vs Web of Science API Expanded

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

APIiTunesDYING73Web of Science API ExpandedHEALTHY88
Uptime · 30d
Uptime · 90d68.6%99.02%
Uptime · 30d46.7%98.3%
P50 · ms578787
P95 · ms14261985
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

iTunes vs Web of Science API Expanded: common questions

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

On our scheduled checks, Web of Science API Expanded leads on measured uptime — iTunes at 68.6% 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, iTunes or Web of Science API Expanded?

iTunes has the lower median latency in our checks — iTunes responds in 578 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 iTunes and Web of Science API Expanded need an API key?

iTunes needs no key, while Web of Science API Expanded requires a free API key. If you want to start calling without signup, reach for iTunes first.

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

Neither sends browser-friendly CORS headers reliably, so call iTunes 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 iTunes and Web of Science API Expanded free for commercial use?

iTunes 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.