shipapis
StarSubmit an APISubmit API

Abstract API vs CDNJS

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

APIAbstract APIHEALTHY89CDNJSHEALTHY95
Uptime · 30d
Uptime · 90d99.02%100%
Uptime · 30d98.3%100%
P50 · ms700281
P95 · ms1656936
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key may be required for productionFree and open, no key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Abstract API vs CDNJS: common questions

Which is more reliable, Abstract API or CDNJS?

On our scheduled checks, CDNJS leads on measured uptime — Abstract API at 99.02% versus CDNJS 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.

Which is faster, Abstract API or CDNJS?

CDNJS has the lower median latency in our checks — Abstract API responds in 700 ms versus CDNJS at 281 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Abstract API and CDNJS need an API key?

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

Can I call Abstract API and CDNJS from the browser?

Yes — both Abstract API and CDNJS 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 Abstract API and CDNJS free for commercial use?

Abstract API has unclear commercial terms, and CDNJS 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.