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Chronicling America vs Court Rules

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

APIChronicling AmericaDEAD0Court RulesDYING37
Uptime · 30d
Uptime · 90d0.0%0.0%
Uptime · 30d0.0%0.0%
P50 · ms——
P95 · ms——
Authnonenone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licensePublic domain / no known copyright (Library of Congress)
Free tierFree — public-domain collection data
Rate limitLoC throttles heavy crawling (see LoC API policy)
In directory since2026-07-052026-10-04
operationalpartialdownno data

Chronicling America vs Court Rules: common questions

Which is more reliable, Chronicling America or Court Rules?

Both are neck-and-neck — Chronicling America and Court Rules each measure 0.0% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Do Chronicling America and Court Rules need an API key?

Neither needs a paid key — Chronicling America is callable with no signup, and Court Rules is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Chronicling America and Court Rules from the browser?

Neither sends browser-friendly CORS headers reliably, so call Chronicling America and Court Rules from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Chronicling America and Court Rules free for commercial use?

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