Test Data — entry 019 of 19
Yes No
Yes No is a single-endpoint novelty API that answers yes or no (and, roughly once every 10,000 requests, an unforced maybe) as a JSON object paired with a matching animated GIF served from its own asset host. An optional force query parameter lets callers pin the answer for deterministic testing without touching the random path. It's free, keyless, and undocumented beyond its own homepage, with no rate limit encountered during live probing.
AuthenticationNone requiredCall it straight away — no key, no signup.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreeNo paid tier — free for the documented use case.
FormatsJSONResponses can be requested as JSON.
GreatAPIs Score
Score74
Authentication25/25No authentication required
Pricing20/20Free to use
Docs0/20No docs or spec available
Formats9/15Single response format
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/yes-no/"><img src="https://greatapis.com/badge/yes-no.svg" alt="Scored 74 on greatapis.com"></a>Auth quickstart
- No key needed — call it now.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.