> ## Documentation Index > Fetch the complete documentation index at: https://docs.sakawave.com/llms.txt > Use this file to discover all available pages before exploring further. # List currencies > Every active currency and the six switches that decide what it can be used for, sorted by code. Filter by a capability to ask a narrower question: "what can I open an account in?" rather than "what exists?". ## The capability model A currency is not simply on or off. Six switches govern it independently, and a transfer reads several of them at once. | Capability | Checked against | | - | - | | `account_issuance` | The currency of an account you are opening. | | `transfer` | The **source** currency of any transfer. | | `own_transfer` | The **destination** currency, when paying your own account. | | `tag_transfer` | The **destination** currency, when paying a Sakawave tag. | | `external_transfer` | The **destination** currency, when paying an external destination. | | `fx` | **Both** currencies, whenever they differ. An active FX corridor for the pair is required too. | So a cross-currency payout to an external bank checks four things: `transfer` on the source, `external_transfer` on the destination, and `fx` on both — then the corridor itself. A capability that is off answers `409 currency_capability_unavailable` at the point of use. Reading this endpoint first turns that into a decision you make rather than an error you handle. `isActive` is always `true` here: an inactive currency is not returned at all. Use `updatedAt` as a cache key. ## Error codes | Status | `code` | Cause | | - | - | - | | `400` | `validation_failed` | `capability` is not one of the six values. | | `401` | `INVALID_API_KEY` | The key is missing, invalid, inactive, expired, from the other environment, or blocked by its IP allowlist. | | `429` | `api_key_rate_limit_exceeded` | The per-minute limit for this key was exceeded. | ## OpenAPI ````yaml /openapi.json get /v1/currencies openapi: 3.1.0 info: title: Sakawave Business API version: 1.0.0-draft summary: >- Accounts, transfers, FX quotes, and transaction reconciliation for Sakawave businesses. description: >- Generated from the public NestJS controllers and their Zod request schemas. Public URLs and policy statements remain draft until the Phase 1 contract checklist is approved. contact: name: Sakawave API Support email: api-support@sakawave.example servers: - url: https://sandbox-api.sakawave.example description: Sandbox (default) - url: https://api.sakawave.example description: Live security: - bearerAuth: [] tags: - name: Bill payments description: Browse the biller catalog, validate a customer, and pay a bill. - name: Cards description: Issue, fund, and control USD virtual and disposable cards. - name: eSIM description: >- Sell mobile data abroad: browse the catalog, buy an eSIM, and manage it once installed. - name: Currencies and countries description: >- Reference data: what may be held, what may be sent where, and which jurisdictions are served. - name: Customers description: Create and manage customers of your business. - name: Accounts description: >- Open business and customer accounts, and issue the destinations that fund them. - name: Transfer destinations description: Resolve temporary destinations and saved recipients. - name: FX quotes description: Create and retrieve time-limited cross-currency quotes. - name: Transfers description: Preview, create, and monitor transfers. - name: Transactions description: Read ledger entries for reconciliation. paths: /v1/currencies: get: tags: - Currencies and countries summary: List currencies description: >- Every active currency and the six switches that decide what it can be used for, sorted by code. Filter by a capability to ask a narrower question: "what can I open an account in?" rather than "what exists?". operationId: listCurrencies parameters: - name: capability in: query required: false description: Return only currencies with this capability enabled. schema: type: string enum: - account_issuance - transfer - fx - own_transfer - tag_transfer - external_transfer example: account_issuance responses: '200': description: Successful response. headers: X-Request-ID: description: >- The request identifier assigned by Sakawave. Include it in support requests. schema: type: string content: application/json: schema: type: array items: $ref: '#/components/schemas/SupportedCurrencyResponse' example: - code: NGN name: Nigerian Naira symbol: ₦ minorUnits: 2 accountIssuanceEnabled: true transferEnabled: true fxEnabled: true ownTransferEnabled: true tagTransferEnabled: true externalTransferEnabled: true isActive: true updatedAt: '2026-08-14T08:00:00.000Z' '400': $ref: '#/components/responses/ValidationError' '401': $ref: '#/components/responses/AuthenticationError' '429': $ref: '#/components/responses/RateLimitError' '500': $ref: '#/components/responses/ServerError' security: - bearerAuth: [] components: schemas: SupportedCurrencyResponse: type: object additionalProperties: false properties: code: type: string minLength: 3 maxLength: 10 description: ISO 4217 code for a fiat currency, or the asset code for crypto. name: type: string maxLength: 80 symbol: type: string maxLength: 8 minorUnits: type: integer minimum: 0 description: >- Decimal places. 2 for most currencies, 0 for UGX, 8 for crypto assets. accountIssuanceEnabled: type: boolean description: An account may be opened in this currency. transferEnabled: type: boolean description: Required on the source currency of any transfer. fxEnabled: type: boolean description: Required on both currencies when a transfer converts. ownTransferEnabled: type: boolean description: >- Required on the destination currency for a transfer to your own account. tagTransferEnabled: type: boolean description: >- Required on the destination currency for a transfer to a Sakawave tag. externalTransferEnabled: type: boolean description: >- Required on the destination currency for a payout to an external destination. isActive: type: boolean description: 'Always true in this response: inactive currencies are not returned.' updatedAt: $ref: '#/components/schemas/IsoTimestamp' required: - code - name - symbol - minorUnits - accountIssuanceEnabled - transferEnabled - fxEnabled - ownTransferEnabled - tagTransferEnabled - externalTransferEnabled - isActive - updatedAt IsoTimestamp: type: string format: date-time example: '2026-08-14T09:00:00.000Z' RequestError: anyOf: - $ref: '#/components/schemas/ValidationError' - $ref: '#/components/schemas/Error' description: >- Either a field-level validation failure carrying an errors array, or a rule the request broke, identified by code. Error: type: object additionalProperties: true properties: statusCode: type: integer message: type: string description: >- A sentence suitable for a log or a support conversation, not for a user interface. code: type: string description: >- The stable machine-readable reason. Branch on this, never on the message. required: - message - code description: >- An error body. Individual errors may add context fields alongside these three. RateLimitError: type: object additionalProperties: false properties: statusCode: const: 429 message: type: string code: const: api_key_rate_limit_exceeded retryAfterSeconds: type: integer minimum: 1 required: - statusCode - message - code - retryAfterSeconds ValidationError: type: object additionalProperties: false properties: statusCode: const: 400 message: type: string description: The single failure, or a count when more than one field failed. code: const: validation_failed errors: type: array items: $ref: '#/components/schemas/ValidationFailure' required: - statusCode - message - code - errors ValidationFailure: type: object additionalProperties: false properties: message: type: string field: type: string code: type: string path: type: array items: anyOf: - type: string - type: integer required: - message - field - code - path responses: ValidationError: description: >- The request was rejected before it was acted on. Field failures list every failing field. headers: X-Request-ID: description: >- The request identifier assigned by Sakawave. Include it in support requests. schema: type: string content: application/json: schema: $ref: '#/components/schemas/RequestError' example: statusCode: 400 message: Must be a valid identifier. code: validation_failed errors: - message: Must be a valid identifier. field: accountId code: custom path: - accountId AuthenticationError: description: >- The API key is missing, invalid, inactive, expired, for another environment, or blocked by its IP allowlist. headers: X-Request-ID: description: >- The request identifier assigned by Sakawave. Include it in support requests. schema: type: string content: application/json: schema: $ref: '#/components/schemas/Error' example: statusCode: 401 code: INVALID_API_KEY message: Invalid or inactive API credentials. RateLimitError: description: The API key rate limit was exceeded. headers: X-Request-ID: description: >- The request identifier assigned by Sakawave. Include it in support requests. schema: type: string content: application/json: schema: $ref: '#/components/schemas/RateLimitError' example: statusCode: 429 message: Too many API requests. Try again later. code: api_key_rate_limit_exceeded retryAfterSeconds: 17 ServerError: description: An unexpected server error occurred. headers: X-Request-ID: description: >- The request identifier assigned by Sakawave. Include it in support requests. schema: type: string content: application/json: schema: $ref: '#/components/schemas/Error' example: statusCode: 500 code: internal_server_error message: An unexpected error occurred. securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: Sakawave API key description: >- A secret API key, sent as `Authorization: Bearer sk_test_…` in sandbox or `Bearer sk_live_…` in live. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.