> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ledgerup.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# List currencies with reported usage.



## OpenAPI

````yaml /openapi/ledgerup-engine.json get /v2/currencies
openapi: 3.1.0
info:
  title: LedgerUp API
  version: 0.1.0
  description: OpenAPI contract for the LedgerUp API.
servers: []
security: []
tags:
  - name: Health
  - name: Customers
  - name: Accounts
  - name: Grants
  - name: Currencies
    description: Currencies discovered from reported usage events.
  - name: Metrics
  - name: Refill Configurations
    description: Automatic balance refill thresholds and targets for an account and metric.
  - name: Events
    description: >-
      Individual usage events reported against an account and either a metric or
      currency.
  - name: Test
    description: Endpoints for test environment maintenance.
  - name: Products
    x-group: Billing
    description: Sellable catalog objects. Products can map to Stripe products.
  - name: Prices
    x-group: Billing
    description: >-
      Simple commercial terms for a product. Contract lines can reference a
      price or a rate card, but not both.
  - name: Rate Cards
    x-group: Billing
    description: Reusable rating policies that convert engine facts into billable amounts.
  - name: Contracts
    x-group: Billing
    description: >-
      Subscription-like commercial agreements. Contracts own contract lines and
      cancellation state.
  - name: Invoice Preview
    x-group: Billing
    description: Read-only preview of LedgerUp invoice lines before any Stripe write.
paths:
  /v2/currencies:
    get:
      tags:
        - Currencies
      summary: List currencies with reported usage.
      operationId: listCurrencies
      responses:
        '200':
          description: Currencies observed in usage events for this company and namespace.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CurrencyList'
        '401':
          $ref: '#/components/responses/UnauthorizedText'
        '403':
          $ref: '#/components/responses/ForbiddenText'
        '408':
          $ref: '#/components/responses/RequestTimeoutText'
        '429':
          $ref: '#/components/responses/RateLimitedText'
        '500':
          $ref: '#/components/responses/InternalServerErrorText'
      security:
        - LedgerUpApiKey: []
components:
  schemas:
    CurrencyList:
      type: object
      additionalProperties: false
      properties:
        data:
          type: array
          items:
            type: string
            description: Lowercase three-letter currency code observed in usage events.
            pattern: ^[a-z]{3}$
            example: usd
        has_more:
          type: boolean
          description: Always false because all observed currencies are returned.
          example: false
      required:
        - data
        - has_more
  responses:
    UnauthorizedText:
      description: Missing or invalid API key.
      content:
        text/plain:
          schema:
            type: string
            example: Invalid API key
    ForbiddenText:
      description: >-
        API key lacks the required permission, or reset was attempted outside
        the test namespace.
      content:
        text/plain:
          schema:
            type: string
    RequestTimeoutText:
      description: Request exceeded the 30 second timeout.
      content:
        text/plain:
          schema:
            type: string
    RateLimitedText:
      description: Rate limit exceeded.
      content:
        text/plain:
          schema:
            type: string
            example: rate limit exceeded
    InternalServerErrorText:
      description: Internal server error or queue failure.
      content:
        text/plain:
          schema:
            type: string
  securitySchemes:
    LedgerUpApiKey:
      type: apiKey
      in: header
      name: x-api-key
      description: LedgerUp API Key.
      x-displayName: LedgerUp API Key

````