Deck of Cards vs SuperHeroes
Same instrument, two spec sheets — measured, not claimed.
Deck of Cards vs SuperHeroes: common questions
Which is more reliable, Deck of Cards or SuperHeroes?
Both are neck-and-neck — Deck of Cards and SuperHeroes each measure 99.02% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.
Which is faster, Deck of Cards or SuperHeroes?
Deck of Cards has the lower median latency in our checks — Deck of Cards responds in 401 ms versus SuperHeroes at 1145 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 Deck of Cards and SuperHeroes need an API key?
Deck of Cards needs no key, while SuperHeroes requires a free API key. If you want to start calling without signup, reach for Deck of Cards first.
Can I call Deck of Cards and SuperHeroes from the browser?
Yes — both Deck of Cards and SuperHeroes 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 Deck of Cards and SuperHeroes free for commercial use?
Deck of Cards has unclear commercial terms, and SuperHeroes 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.