shipapis
StarSubmit an APISubmit API

Chronicling America vs GitHub Contribution Chart Generator

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

APIChronicling AmericaNEW—GitHub Contribution Chart GeneratorNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licensePublic domain / no known copyright (Library of Congress)Unverified (derived from public GitHub profile data)
Free tierFree — public-domain collection dataFree — no key
Rate limitLoC throttles heavy crawling (see LoC API policy)Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Chronicling America vs GitHub Contribution Chart Generator: common questions

Which is more reliable, Chronicling America or GitHub Contribution Chart Generator?

On our scheduled checks, GitHub Contribution Chart Generator leads on measured uptime — Chronicling America at —% versus GitHub Contribution Chart Generator 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 GitHub Contribution Chart Generator need an API key?

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

Can I call Chronicling America and GitHub Contribution Chart Generator from the browser?

Neither sends browser-friendly CORS headers reliably, so call Chronicling America and GitHub Contribution Chart Generator 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 GitHub Contribution Chart Generator free for commercial use?

Chronicling America allows commercial use on its free tier, and GitHub Contribution Chart Generator 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.