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Chronicling America vs New York Times

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

APIChronicling AmericaNEW—New York TimesNEW—
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 — 500 requests/day
Rate limitLoC throttles heavy crawling (see LoC API policy)500 requests/day on free plan
In directory since2026-07-052026-07-05
operationalpartialdownno data

Chronicling America vs New York Times: common questions

Which is more reliable, Chronicling America or New York Times?

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

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

Can I call Chronicling America and New York Times from the browser?

Only New York Times 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 New York Times free for commercial use?

Chronicling America allows commercial use on its free tier, and New York Times 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.