openapi: 3.0.3
info:
  title: Alpaca API (Trading, Market Data, Broker) Account Assets API
  description: A grounded, curated OpenAPI description of Alpaca's public REST surface. Alpaca is a developer-first, commission-free brokerage whose stock, ETF, options, and crypto trading and market data are exposed entirely through APIs. This document covers the three REST products - the Trading API (api.alpaca.markets/v2, with a free paper sandbox at paper-api.alpaca.markets/v2), the Market Data API (data.alpaca.markets, with v2 stocks, v1beta3 crypto, and v1beta1 options/news/screener namespaces), and the Broker API (broker-api.alpaca.markets/v1). Real-time WebSocket streaming for market data is described in the companion AsyncAPI document at asyncapi/alpaca-markets-asyncapi.yml. Trading and Market Data authenticate with the APCA-API-KEY-ID and APCA-API-SECRET-KEY headers (or OAuth2 for third-party apps); the Broker API uses HTTP Basic auth. This spec is a representative subset of the full API for discovery purposes, not an exhaustive vendor specification.
  version: '1.0'
  contact:
    name: Alpaca
    url: https://alpaca.markets
  license:
    name: API documentation - Alpaca Terms of Service
    url: https://alpaca.markets/terms
servers:
- url: https://api.alpaca.markets/v2
  description: Trading API - live
- url: https://paper-api.alpaca.markets/v2
  description: Trading API - paper (free sandbox)
- url: https://data.alpaca.markets
  description: Market Data API
- url: https://broker-api.alpaca.markets/v1
  description: Broker API - production
security:
- apcaKey: []
  apcaSecret: []
tags:
- name: Assets
  description: Tradable asset catalog.
paths:
  /assets:
    get:
      operationId: listAssets
      tags:
      - Assets
      summary: List assets
      description: Retrieves the catalog of tradable and non-tradable assets.
      parameters:
      - name: status
        in: query
        schema:
          type: string
        description: Filter by asset status, for example active.
      - name: asset_class
        in: query
        schema:
          type: string
          enum:
          - us_equity
          - us_option
          - crypto
        description: Filter by asset class.
      responses:
        '200':
          description: A list of assets.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Asset'
  /assets/{symbol_or_asset_id}:
    get:
      operationId: getAsset
      tags:
      - Assets
      summary: Get an asset
      description: Retrieves a single asset by symbol or asset ID.
      parameters:
      - name: symbol_or_asset_id
        in: path
        required: true
        schema:
          type: string
        description: Symbol or asset UUID.
      responses:
        '200':
          description: The asset.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Asset'
components:
  schemas:
    Asset:
      type: object
      description: A tradable asset.
      properties:
        id:
          type: string
          description: Asset UUID.
        class:
          type: string
          description: Asset class, for example us_equity, us_option, crypto.
        symbol:
          type: string
          description: The asset's symbol.
        name:
          type: string
          description: The asset's name.
        exchange:
          type: string
          description: The listing exchange.
        tradable:
          type: boolean
          description: Whether the asset is tradable on Alpaca.
        fractionable:
          type: boolean
          description: Whether fractional orders are supported.
  securitySchemes:
    apcaKey:
      type: apiKey
      in: header
      name: APCA-API-KEY-ID
      description: Alpaca API key ID. Paired with APCA-API-SECRET-KEY.
    apcaSecret:
      type: apiKey
      in: header
      name: APCA-API-SECRET-KEY
      description: Alpaca API secret key. Paired with APCA-API-KEY-ID.
    brokerBasic:
      type: http
      scheme: basic
      description: Broker API HTTP Basic auth using your Broker API key as username and secret as password.