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Chronicling America vs Kaggle

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

APIChronicling AmericaNEW—KaggleNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licensePublic domain / no known copyright (Library of Congress)Unverified
Free tierFree — public-domain collection dataFree tier — key may be required
Rate limitLoC throttles heavy crawling (see LoC API policy)Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Chronicling America vs Kaggle: common questions

Which is more reliable, Chronicling America or Kaggle?

On our scheduled checks, Kaggle leads on measured uptime — Chronicling America at —% versus Kaggle 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 Chronicling America and Kaggle need an API key?

Chronicling America needs no key, while Kaggle requires a free API key. If you want to start calling without signup, reach for Chronicling America first.

Can I call Chronicling America and Kaggle from the browser?

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

Are Chronicling America and Kaggle free for commercial use?

Chronicling America allows commercial use on its free tier, and Kaggle 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.