Deck of Cards vs xkcd
Same instrument, two spec sheets — measured, not claimed.
Deck of Cards vs xkcd: common questions
Which is more reliable, Deck of Cards or xkcd?
On our scheduled checks, xkcd leads on measured uptime — Deck of Cards at —% versus xkcd 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 Deck of Cards and xkcd need an API key?
Neither needs a paid key — Deck of Cards is callable with no signup, and xkcd is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Deck of Cards and xkcd from the browser?
Only Deck of Cards is browser-friendly — it returns CORS headers over HTTPS. xkcd needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Deck of Cards and xkcd free for commercial use?
Deck of Cards has unclear commercial terms, and xkcd is personal/non-commercial only. 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.