Flexa Assets API

openapi: 3.1.1
info:
  title: Flexa Assets API
  description: 'The Flexa API offers access to Flexa’s powerful, instant, and completely fraud-resistant platform for accepting digital asset payments from your customers.


    # Authentication


    All requests to the Flexa API are authenticated with API keys, which are accepted using [HTTP Basic Authentication](https://en.wikipedia.org/wiki/Basic_access_authentication). To connect, simply include your API key as the “username” value when providing the `Authorization` header. A password is not required.


    Your API keys are sensitive credentials—please take care to secure them properly so that they don’t fall into the wrong hands. If you need to rotate your API keys for any reason, simply reach out to [Flexa Support](mailto:support@flexa.co).


    If you want to make requests against the Flexa API without moving any actual value, use your test API keys. Test API keys are prefixed `publishable_test_` or `secret_test_`, and can be used to experiment with the Flexa API using test mode assets, which include all popular testnet assets as well as Flexa Credit (CR).

    '
  version: '2025-12-18'
  contact:
    name: Flexa Support
    url: https://support.flexa.co
    email: support@flexa.co
  license:
    name: CC BY-ND 4.0
    url: https://creativecommons.org/licenses/by-nd/4.0/
servers:
- url: https://api.flexa.co
security:
- BasicAuth: []
tags:
- name: Assets
  description: 'Assets encompass all the value that flows through the Flexa platform. In the Flexa API, both national currencies (“fiat“) and digital currencies (“crypto“ or “digital assets“) are returned together in one collection.


    The Flexa API uses [CAIP](https://chainagnostic.org/CAIPs/caip-19)-style IDs for all assets. National currency asset IDs are all prefixed with “iso4217/” and use [ISO 4217](https://en.wikipedia.org/wiki/ISO_4217) 3-digit alphabetic codes. For example, ether on Ethereum mainnet is `eip155:1/slip44:60`, and the Canadian dollar is `iso4217/CAD`.

    '
paths:
  /assets:
    get:
      tags:
      - Assets
      summary: List all Assets
      description: Returns a list of all assets supported by Flexa for payments.
      parameters:
      - $ref: '#/components/parameters/FlexaVersion'
      responses:
        '200':
          description: OK
          headers:
            Flexa-Version:
              $ref: '#/components/headers/Flexa-Version'
          content:
            application/json:
              schema:
                allOf:
                - $ref: '#/components/schemas/Collection'
                - type: object
                  properties:
                    url:
                      type: string
                      example: /assets
                    data:
                      type: array
                      items:
                        $ref: '#/components/schemas/Asset'
  /assets/{id}:
    get:
      tags:
      - Assets
      summary: Retrieve an Asset
      description: Retrieves the details of a specific asset.
      parameters:
      - $ref: '#/components/parameters/FlexaVersion'
      responses:
        '200':
          description: OK
          headers:
            Flexa-Version:
              $ref: '#/components/headers/Flexa-Version'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Asset'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  schemas:
    Asset:
      type: object
      properties:
        id:
          type: string
          description: The [CAIP-19](https://chainagnostic.org/CAIPs/caip-19) ID of the asset. National currencies such as the United States dollar are identified using the prefix “iso4217/” and the 3-digit alphabetic code of [ISO 4217](https://en.wikipedia.org/wiki/ISO_4217).
          example: eip155:1/slip44:60
        object:
          type: string
          example: asset
        chain:
          description: A chain object including details of the chain on which this asset was issued. Not applicable to national currency assets.
          $ref: '#/components/schemas/Chain'
        color:
          type: string
          description: A hexadecimal color that can be used for tinting any UI related to this asset.
          example: '#5700ff'
        decimals:
          type: integer
          description: The number of decimal places used by this asset.
          example: 18
        icon_url:
          type: string
          description: The URL for the asset's icon.
          example: https://flexa.media/assets/ether.svg
        name:
          type: string
          description: The common name of the asset.
          example: Ether
        namespace:
          type: string
          description: The [CAIP namespace](https://namespaces.chainagnostic.org) of the asset.
          example: eip155
        profile:
          type: string
          description: The ID of the asset profile for this asset.
          example: assetpf_f5q8f4J97jcxPW5Fwwv6g
        symbol:
          type: string
          description: The common trading symbol of the asset.
          example: ETH
        test_mode:
          type: boolean
          description: Whether this asset is valueless and thus available in test mode (true) or live mode where it can be used to exchange real value (false).
          example: false
        created:
          type: integer
          description: The time at which this asset was enabled on Flexa, in non-leap seconds since the Unix epoch.
          example: 1520845080
        updated:
          type: integer
          description: The time at which Flexa’s information about this asset was last updated, in non-leap seconds since the Unix epoch.
          example: 1520845080
    NotFoundError:
      x-scalar-ignore: true
      description: RFC 7807 (https://datatracker.ietf.org/doc/html/rfc7807)
      type: object
      properties:
        type:
          type: string
          examples:
          - https://example.com/errors/not-found
        title:
          type: string
          examples:
          - Not Found
        status:
          type: integer
          format: int64
          examples:
          - 404
        detail:
          type: string
          examples:
          - The resource you are trying to access does not exist.
    Chain:
      type: object
      properties:
        id:
          type: string
          description: The [CAIP-2](https://chainagnostic.org/CAIPs/caip-2) ID of the chain.
          example: eip155:1
        object:
          type: string
          example: chain
        name:
          type: string
          description: The name of the chain.
          example: Ethereum
        namespace:
          type: string
          description: The [CAIP namespace](https://namespaces.chainagnostic.org) of the chain.
          example: eip155
        native_asset:
          type: string
          description: The chain's native asset, specified as a [CAIP-19](https://chainagnostic.org/CAIPs/caip-19) ID.
          example: eip155:1/slip44:60
        network:
          type: string
          description: The ID of the network to which this chain is associated.
          example: netwrk_7cM535QGJMQ5F6Q5xW4Jh
        test_network:
          type: boolean
          description: Whether this chain serves as a test network on which developers can make valueless transactions.
          example: false
        created:
          type: integer
          description: The time at which this chain was enabled on Flexa, in non-leap seconds since the Unix epoch.
          example: 1520845080
        updated:
          type: integer
          description: The time at which Flexa’s information about this chain was last updated, in non-leap seconds since the Unix epoch.
          example: 1520845080
    Collection:
      description: A collection
      type: object
      properties:
        object:
          type: string
          example: collection
        url:
          type: string
        has_more:
          type: boolean
          example: true
  parameters:
    FlexaVersion:
      in: header
      name: Flexa-Version
      description: The API version to use for processing this request.
      schema:
        type: string
        example: '2025-12-18'
  responses:
    NotFound:
      description: Not Found
      headers:
        Flexa-Version:
          $ref: '#/components/headers/Flexa-Version'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/NotFoundError'
  headers:
    Flexa-Version:
      description: The API version used to process this request.
      schema:
        type: string
        example: '2025-12-18'
  securitySchemes:
    BasicAuth:
      type: http
      scheme: basic
      description: Basic HTTP authentication
x-ext-urls: {}