Polygon 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
PAID
Auth
API_KEY
CORS
No
Rate limit
Unknown
Health
630ms
Trust score
87 (B)

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

Strong candidate; weakest signal is CORS.

Links

Integration checklist

  • Auth is API_KEY
  • No CORS — route calls through your backend.
  • Rate limit: Unknown
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