Polygon.io

Real-time market data for NASDAQ, NYSE and options — industry standard for algo trading.

FinanceFreemiumfreemiumדורש מפתחמניות

About this API

Polygon.io is best-known in the algo trading community — real-time data, 20y of history, full options support. Free tier is 5 rpm and end-of-day only. Real-time plans run $29–$199/month.

Who it's for

Algo traders

Finance-AI developers

Market research

How to use it

1
Register at polygon.io for an API key.
2
Call /v2/aggs/ticker/{ticker}/prev.

Installation & setup

`npm install @polygon.io/client-js`.

Code examples

curl "https://api.polygon.io/v2/aggs/ticker/AAPL/prev?apiKey=YOUR_KEY"

Sample response

{
  "ticker": "AAPL",
  "results": [
    {
      "c": 189.43,
      "h": 191.05,
      "l": 188.27,
      "o": 190.15,
      "v": 56000000
    }
  ],
  "status": "OK"
}

FAQ

For serious traders yes. For hobbyists Alpha Vantage is enough.

Tips & pitfalls

For historical storage — /v2/aggs/ticker/.../range/... returns daily history.

Guides

How to use Polygon.io — practical guide

Polygon.io — beginner's guide

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