openapi: 3.1.0
info:
  title: Bitwise ETFs Indexes API
  version: v1
  description: Read-only market-data API for Bitwise indexes, ETFs, and fund data. Returns index metadata, historical daily index values, index constituents with prices/supplies/weights, per-fund data (market price, NAV, AUM, holdings, crypto-per-share, performance), and ETF listings and details. Endpoints and the authentication model are derived from the provider's published Postman collection at https://developers.bitwiseinvestments.com/; base host and error envelope were confirmed by live probe of https://api.bitwiseinvestments.com.
  contact:
    name: Bitwise API Support
    email: api@bitwiseinvestments.com
    url: https://developers.bitwiseinvestments.com/
  termsOfService: https://bitwiseinvestments.com/terms-of-service
servers:
- url: https://api.bitwiseinvestments.com
  description: Production
security:
- apiKeyAuth: []
tags:
- name: Indexes
  description: Bitwise crypto index metadata, history, and constituents.
paths:
  /api/v1/indexes:
    get:
      operationId: listIndexes
      tags:
      - Indexes
      summary: List indexes
      description: Returns metadata about available indexes, including their names, inception dates, descriptions, and constituent assets.
      responses:
        '200':
          description: Index metadata list.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Index'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /api/v1/indexes/{indexName}/history:
    get:
      operationId: getIndexHistory
      tags:
      - Indexes
      summary: Get index history
      description: Returns historical daily index values. Each element contains a date and the corresponding index value. By default all values are included from 2017-01-01 (or index inception), including backtested data. Results can be filtered by date range and can exclude backtested values.
      parameters:
      - name: indexName
        in: path
        required: true
        description: Index identifier (e.g. DEFI).
        schema:
          type: string
          example: DEFI
      - name: startDate
        in: query
        required: false
        description: Earliest date to include (YYYY-MM-DD).
        schema:
          type: string
          format: date
      - name: endDate
        in: query
        required: false
        description: Latest date to include (YYYY-MM-DD).
        schema:
          type: string
          format: date
      - name: excludeBacktested
        in: query
        required: false
        description: Exclude backtested values from the series.
        schema:
          type: boolean
      responses:
        '200':
          description: Daily index value series.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/IndexHistoryPoint'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /api/v1/indexes/{indexName}/constituents:
    get:
      operationId: getIndexConstituents
      tags:
      - Indexes
      summary: Get index constituents
      description: Returns current and past index information including index value and constituent assets with their prices, supplies, and weights. A timestamp may be supplied to retrieve data from a particular point in time; omit it to receive the most recent available data.
      parameters:
      - name: indexName
        in: path
        required: true
        description: Index identifier (e.g. DEFI).
        schema:
          type: string
          example: DEFI
      - name: timestamp
        in: query
        required: false
        description: Point-in-time to retrieve constituents for.
        schema:
          type: string
          format: date-time
      responses:
        '200':
          description: Index value plus weighted constituents.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/IndexConstituents'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  schemas:
    IndexConstituents:
      type: object
      properties:
        value:
          type: number
        timestamp:
          type: string
          format: date-time
        constituents:
          type: array
          items:
            type: object
            properties:
              asset:
                type: string
              price:
                type: number
              supply:
                type: number
              weight:
                type: number
    Index:
      type: object
      description: Index metadata (shape not published; representative fields).
      properties:
        name:
          type: string
        inceptionDate:
          type: string
          format: date
        description:
          type: string
        constituents:
          type: array
          items:
            type: string
    IndexHistoryPoint:
      type: object
      properties:
        date:
          type: string
          format: date
        value:
          type: number
    Error:
      type: object
      description: Bitwise error envelope (not RFC 9457).
      properties:
        message:
          type: string
        id:
          type: string
          description: Machine-readable error identifier.
        errors:
          type: array
          items:
            type: object
            properties:
              field:
                type: string
              message:
                type: string
  responses:
    Unauthorized:
      description: Authentication credentials were missing or incorrect.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            message: Authentication credentials were missing or incorrect.
            id: unauthorized_request
            errors:
            - field: apiKey
              message: Invalid or missing API key
  securitySchemes:
    apiKeyAuth:
      type: apiKey
      in: header
      name: Authorization
      description: API key sent in the Authorization header. Request a key from api@bitwiseinvestments.com.
x-apievangelist-generated: '2026-07-18'
x-apievangelist-method: derived
x-apievangelist-source: postman/bitwise-collection.json (published collection https://developers.bitwiseinvestments.com/)