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Chronicling America vs Invokely

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

APIChronicling AmericaDEAD0InvokelyREACHABLE100
Uptime · 30d
Uptime · 90d0.0%100%
Uptime · 30d0.0%100%
P50 · ms—227
P95 · ms—245
AuthnoneapiKey
CORSnoyes
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 since2026-07-052026-10-12
operationalpartialdownno data

Chronicling America vs Invokely: common questions

Which is more reliable, Chronicling America or Invokely?

On our scheduled checks, Invokely leads on measured uptime — Chronicling America at 0.0% versus Invokely at 100% 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 Invokely need an API key?

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

Can I call Chronicling America and Invokely from the browser?

Only Invokely 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 Invokely free for commercial use?

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