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Public APIs · by APILayerData from public-apis (MIT)
  1. Home
  2. /Finance
  3. /Polygon
Finance
Polygon logo

Polygon

Historical stock market data.

Polygon API is a free Finance API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.

Authentication
apiKey
HTTPS
Yes
CORS
Unknown
Category
Finance
Visit documentation ↗polygon.io

About Massive

Stock API with real-time and historical tick data, unlimited usage via REST or WebSockets, standardized JSON and CSV formats. Instant access free tier.

Provider
Massive
Website
polygon.io ↗

Details from polygon.io.

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Polygon API alternatives

Plaid logo

Plaid

Connect with user's bank accounts and access transaction data

apiKeyHTTPSCORS ?
PolyKal Fees logo

PolyKal Fees

Kalshi & Polymarket trading fee rates and formulas as verified JSON

No authHTTPSCORS
P

PIT Financial State

Point-in-time quarterly revenue for 20 U.S. issuers

apiKeyHTTPSCORS ?
Portfolio Optimizer logo

Portfolio Optimizer

Portfolio analysis and optimization

No authHTTPSCORS
Pink Agentic AI Payments logo

Pink Agentic AI Payments

Approval layer for AI agent payments: per-agent budgets, rules, single-use credentials, sandbox

apiKeyHTTPSCORS
Razorpay IFSC logo

Razorpay IFSC

Indian Financial Systems Code (Bank Branch Codes)

No authHTTPSCORS ?

Polygon API FAQ

Who provides the Polygon API?

The Polygon API is provided by Massive (polygon.io). Stock API with real-time and historical tick data, unlimited usage via REST or WebSockets, standardized JSON and CSV formats. Instant access free tier.

Is the Polygon API free?

Yes. The Polygon API is listed in the Finance category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.

Does the Polygon API require an API key?

Yes. The Polygon API uses apiKey authentication, so you need to register for credentials before making requests.

Can I call the Polygon API from the browser?

CORS support for the Polygon API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.

Does the Polygon API support HTTPS?

Yes. The Polygon API is served over HTTPS, so it's safe to use in production.