Polygon.io

Polygon.io (rebranded as Massive in early 2026) provides real-time and historical market data APIs across stocks, options, indices, forex, crypto, and futures via REST, WebSocket streaming, and S3-style flat files. APIs cover trades, quotes, aggregates, snapshots, ticker reference data, and corporate actions.

6 APIs 0 Features

FintechMarket DataStocksOptionsForexCryptoIndicesFuturesWebSocketsReal-timeHistorical

APIs

Polygon.io Stocks API

Real-time and historical US equity market data including aggregates (minute/hour/day bars), trades, NBBO quotes, snapshots, ticker reference, splits, dividends, and financials. ...

Polygon.io Options API

OPRA-licensed options market data via REST and WebSocket: aggregates, trades, quotes, snapshots, contract reference, and option chains.

Polygon.io Indices API

Real-time and historical index values for major US and global indices via REST and WebSocket.

Polygon.io Forex API

Real-time and historical FX prices for 1,000+ currency pairs via REST and WebSocket.

Polygon.io Crypto API

Aggregates, trades, snapshots, level-2 books, and L2 streaming for crypto pairs across major exchanges.

Polygon.io Futures API

Real-time and historical futures market data including aggregates, trades, quotes, and snapshots.

Collections

Polygon.io REST API (Stocks)

OPEN

Pricing Plans

Polygon Io Plans Pricing

5 plans

PLANS

Rate Limits

Polygon Io Rate Limits

4 limits

RATE LIMITS

FinOps

Polygon Io Finops

FINOPS

Event Specifications

Polygon.io WebSocket APIs

Streaming WebSocket APIs from Polygon.io (now operating as Massive) for real-time and delayed US Stocks, Options, Forex, Crypto, Indices, and Futures market data. Clients connec...

ASYNCAPI

Resources

Sources

opencollection: 1.0.0
info:
  name: Polygon.io REST API (Stocks)
  version: '1.0'
request:
  auth:
    type: apikey
    key: apiKey
    value: '{{apiKey}}'
    placement: query
items:
- info:
    name: Aggregates
    type: folder
  items:
  - info:
      name: Get aggregate (OHLC) bars for a ticker
      type: http
    http:
      method: GET
      url: https://api.polygon.io/v2/aggs/ticker/:stocksTicker/range/:multiplier/:timespan/:from/:to
      params:
      - name: stocksTicker
        value: ''
        type: path
        description: Case-sensitive stock ticker symbol (e.g., AAPL).
      - name: multiplier
        value: ''
        type: path
        description: Size of the timespan multiplier.
      - name: timespan
        value: ''
        type: path
      - name: from
        value: ''
        type: path
        description: Start of the aggregate window (YYYY-MM-DD or millisecond timestamp).
      - name: to
        value: ''
        type: path
        description: End of the aggregate window (YYYY-MM-DD or millisecond timestamp).
      - name: adjusted
        value: ''
        type: query
        description: Whether the results are adjusted for splits.
      - name: sort
        value: ''
        type: query
      - name: limit
        value: ''
        type: query
    docs: 'Returns aggregate bars for a stock over a given date range in

      custom time window sizes (e.g., 5-minute bars between two dates).

      '
- info:
    name: Reference
    type: folder
  items:
  - info:
      name: List ticker symbols
      type: http
    http:
      method: GET
      url: https://api.polygon.io/v3/reference/tickers
      params:
      - name: ticker
        value: ''
        type: query
        description: Filter by specific ticker symbol.
      - name: type
        value: ''
        type: query
      - name: market
        value: ''
        type: query
      - name: exchange
        value: ''
        type: query
      - name: active
        value: ''
        type: query
      - name: search
        value: ''
        type: query
      - name: order
        value: ''
        type: query
      - name: limit
        value: ''
        type: query
      - name: sort
        value: ''
        type: query
    docs: Retrieve a comprehensive list of ticker symbols supported across asset classes.
  - info:
      name: Get ticker details
      type: http
    http:
      method: GET
      url: https://api.polygon.io/v3/reference/tickers/:ticker
      params:
      - name: ticker
        value: ''
        type: path
      - name: date
        value: ''
        type: query
    docs: Retrieve detailed reference information for a single ticker symbol.
bundled: true