Launch Library 2 vs OpenAlex

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

Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms
P95 · ms
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedCC0
Free tierFree — no key (The Space Devs LL2)Free tier (~$1/day of usage); free API key available for more
Rate limitAnonymous requests are throttled to a low rate (see docs)Usage-metered free tier (~$1/day per docs)
In directory since2026-07-052026-07-05
operationalpartialdownno data

Launch Library 2 vs OpenAlex: common questions

Which is more reliable, Launch Library 2 or OpenAlex?

On our scheduled checks, OpenAlex leads on measured uptime — Launch Library 2 at —% versus OpenAlex 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 Launch Library 2 and OpenAlex need an API key?

Neither needs a paid key — Launch Library 2 is callable with no signup, and OpenAlex is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Launch Library 2 and OpenAlex from the browser?

Yes — both Launch Library 2 and OpenAlex send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Launch Library 2 and OpenAlex free for commercial use?

Launch Library 2 has unclear commercial terms, and OpenAlex 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.