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Bureau of Labor Statistics Public Data API vs Chronicling America

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

APIBureau of Labor Statistics Public Data APINEW—Chronicling AmericaNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedPublic domain / no known copyright (Library of Congress)
Free tierFree — limits not publishedFree — public-domain collection data
Rate limitUnpublishedLoC throttles heavy crawling (see LoC API policy)
In directory since2026-07-052026-07-05
operationalpartialdownno data

Bureau of Labor Statistics Public Data API vs Chronicling America: common questions

Which is more reliable, Bureau of Labor Statistics Public Data API or Chronicling America?

On our scheduled checks, Chronicling America leads on measured uptime — Bureau of Labor Statistics Public Data API at —% versus Chronicling America 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 Bureau of Labor Statistics Public Data API and Chronicling America need an API key?

Neither needs a paid key — Bureau of Labor Statistics Public Data API is callable with no signup, and Chronicling America is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Bureau of Labor Statistics Public Data API and Chronicling America from the browser?

Neither sends browser-friendly CORS headers reliably, so call Bureau of Labor Statistics Public Data API and Chronicling America from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Bureau of Labor Statistics Public Data API and Chronicling America free for commercial use?

Bureau of Labor Statistics Public Data API has unclear commercial terms, and Chronicling America allows commercial use on its free tier. 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.