Test Data — entry 018 of 18
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
Score88
Authentication25/25No authentication required
Pricing20/20Free to use
Docs14/20Documentation URL provided
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 88 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.