Polygon.io API

Finance · Operational · 30d uptime 100%
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Stock API with real-time and historical tick data, unlimited usage via REST or WebSockets, standardized JSON and CSV formats. Instant access free tier.

Trust signals

Pricing
FREEMIUM
Auth
API_KEY
CORS
No
Rate limit
5 requests/minute free; scales with plan
Health
669ms
Trust score
90 (A)

Last checked Oct 16, 2026 · uptime 24h 100% / 7d 100% / 30d 100%

Excellent production-readiness signals.

Links

Integration checklist

  • Auth is API_KEY— no credit card required
  • No CORS — route calls through your backend.
  • Rate limit: 5 requests/minute free; scales with plan
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