Massive (formerly Polygon.io) Markets API

Markets, exchanges, holidays, and status.

Documentation GitHub OpenAPI

Operations 4

Each operation below carries the questions people ask an LLM about it and the instructions they give an agent to run it. Generated by API Evangelist overlay

GET /v3/reference/markets List supported markets · List Markets #

Ask an LLM

“Which markets are supported for data?”

“What market types can I query?”

Tell an agent

List all supported markets.

Show me which markets are available.

GET /v3/reference/exchanges List exchanges by asset class · List Exchanges #

Ask an LLM

“Which exchanges are listed for stocks or options?”

“Can I filter exchanges by locale?”

Tell an agent

List exchanges for asset class {asset_class}.

Show exchanges in locale {locale}.

GET /v1/marketstatus/upcoming List upcoming US market holidays · List Upcoming Market Holidays #

Ask an LLM

“When is the next US stock market holiday?”

“Is the market closing early on an upcoming holiday?”

Tell an agent

List upcoming market holidays.

Show the holiday session schedule for US markets.

GET /v1/marketstatus/now Check whether US markets are open now · Get Current Market Status #

Ask an LLM

“Is the US stock market open right now?”

“Are we in pre-market or after-hours trading at the moment?”

Tell an agent

Check the current US market status.

Tell me if markets are open right now.

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OpenAPI Specification

openapi: 3.2.0
info:
  title: Polygon Reference REST Markets API
  version: '1.0'
  description: 'Polygon Reference API exposes reference and corporate-actions data

    shared across asset classes via `https://api.polygon.io`. This spec

    covers tickers, ticker details, ticker types, markets, exchanges,

    market holidays, market status, conditions, splits, dividends, and

    ticker news. Auth uses an API key via `apiKey` query parameter or

    `Authorization: Bearer`.'
  contact:
    name: Polygon Documentation
    url: https://polygon.io/docs/stocks/get_v3_reference_tickers
servers:
- url: https://api.polygon.io
  description: Polygon REST API
security:
- apiKeyQuery: []
- bearerAuth: []
tags:
- name: Markets
  description: Markets, exchanges, holidays, and status.
paths:
  /v3/reference/markets:
    get:
      tags:
      - Markets
      operationId: listMarkets
      summary: List Markets
      responses:
        '200':
          description: Markets response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MarketsResponse'
  /v3/reference/exchanges:
    get:
      tags:
      - Markets
      operationId: listExchanges
      summary: List Exchanges
      parameters:
      - in: query
        name: asset_class
        schema:
          type: string
      - in: query
        name: locale
        schema:
          type: string
      responses:
        '200':
          description: Exchanges response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ExchangesResponse'
  /v1/marketstatus/upcoming:
    get:
      tags:
      - Markets
      operationId: listUpcomingMarketHolidays
      summary: List Upcoming Market Holidays
      description: List upcoming US market holidays and the corresponding session schedule.
      responses:
        '200':
          description: Upcoming market holidays response
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/MarketHoliday'
  /v1/marketstatus/now:
    get:
      tags:
      - Markets
      operationId: getCurrentMarketStatus
      summary: Get Current Market Status
      description: Get the current trading status for US markets.
      responses:
        '200':
          description: Market status response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MarketStatusResponse'
components:
  schemas:
    Market:
      type: object
      properties:
        market:
          type: string
        desc:
          type: string
    ExchangesResponse:
      type: object
      properties:
        status:
          type: string
        request_id:
          type: string
        count:
          type: integer
        results:
          type: array
          items:
            $ref: '#/components/schemas/Exchange'
    MarketStatusResponse:
      type: object
      properties:
        market:
          type: string
        serverTime:
          type: string
          format: date-time
        exchanges:
          type: object
          additionalProperties:
            type: string
        currencies:
          type: object
          additionalProperties:
            type: string
        earlyHours:
          type: boolean
        afterHours:
          type: boolean
    MarketHoliday:
      type: object
      properties:
        exchange:
          type: string
        name:
          type: string
        date:
          type: string
          format: date
        status:
          type: string
        open:
          type: string
        close:
          type: string
    MarketsResponse:
      type: object
      properties:
        status:
          type: string
        results:
          type: array
          items:
            $ref: '#/components/schemas/Market'
    Exchange:
      type: object
      properties:
        id:
          type: integer
        type:
          type: string
        asset_class:
          type: string
        locale:
          type: string
        name:
          type: string
        acronym:
          type: string
        mic:
          type: string
        operating_mic:
          type: string
        participant_id:
          type: string
        url:
          type: string
          format: uri
  securitySchemes:
    apiKeyQuery:
      type: apiKey
      in: query
      name: apiKey
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: API Key

Massive (formerly Polygon.io) Markets API

Operations 4

Documentation

Specifications

Schemas & Data

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OpenAPI Specification