openapi: 3.1.0
info:
  title: Polygon Crypto REST Aggregates Conversion API
  version: '1.0'
  description: 'Polygon Crypto API exposes aggregated cross-exchange data for crypto

    pairs (e.g., X:BTCUSD) via `https://api.polygon.io`. This spec

    covers aggregates, daily open/close, snapshots, and level-2 books.

    Auth uses an API key via `apiKey` query parameter or

    `Authorization: Bearer`.

    '
  contact:
    name: Polygon Documentation
    url: https://polygon.io/docs/crypto
servers:
- url: https://api.polygon.io
  description: Polygon REST API
security:
- apiKeyQuery: []
- bearerAuth: []
tags:
- name: Conversion
  description: Real-time currency conversion.
paths:
  /v1/conversion/{from}/{to}:
    get:
      tags:
      - Conversion
      operationId: getForexConversion
      summary: Convert From One Currency To Another
      description: Get currency conversion rate and converted amount.
      parameters:
      - in: path
        name: from
        required: true
        schema:
          type: string
          minLength: 3
          maxLength: 3
      - in: path
        name: to
        required: true
        schema:
          type: string
          minLength: 3
          maxLength: 3
      - in: query
        name: amount
        schema:
          type: number
          default: 100
      - in: query
        name: precision
        schema:
          type: integer
          minimum: 0
          maximum: 4
          default: 2
      responses:
        '200':
          description: Conversion response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ConversionResponse'
components:
  schemas:
    ConversionResponse:
      type: object
      properties:
        status:
          type: string
        request_id:
          type: string
        from:
          type: string
        to:
          type: string
        initialAmount:
          type: number
        converted:
          type: number
        last:
          type: object
          properties:
            ask:
              type: number
            bid:
              type: number
            exchange:
              type: integer
            timestamp:
              type: integer
              format: int64
  securitySchemes:
    apiKeyQuery:
      type: apiKey
      in: query
      name: apiKey
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: API Key