GPTZero API

AI · Operational · 30d uptime 100%
Homepage

Best free AI detector - simply paste your text to instantly get an overall AI score and advanced sentence by sentence detection.

Trust signals

Pricing
FREEMIUM
Auth
API_KEY
CORS
No
Rate limit
Word quotas by plan
Health
484ms
Trust score
87 (B)

Last checked Sep 4, 2026 · uptime 24h 100% / 7d 100% / 30d 100%

Strong candidate; weakest signal is CORS.

Links

Integration checklist

  • Auth is API_KEY— no credit card required
  • No CORS — route calls through your backend.
  • Rate limit: Word quotas by plan
More ai APIs
GPTZero API API — pricing, auth, CORS & health | Reqistry