openapi: 3.0.3
info:
  title: SAP BRIM (Billing and Revenue Innovation Management) SAP BRIM Convergent Charging Balances Subscription Items API
  description: API for real-time charging and rating of usage-based services within the SAP BRIM (Billing and Revenue Innovation Management) suite. Supports complex pricing models, prepaid and postpaid scenarios, tiered and volume-based pricing, and real-time balance management.
  version: 1.0.0
  contact:
    name: SAP Support
    email: support@sap.com
    url: https://support.sap.com
  license:
    name: SAP Developer License
    url: https://www.sap.com/about/legal/terms-of-use.html
  termsOfService: https://www.sap.com/about/legal/terms-of-use.html
servers:
- url: https://api.sap.com/convergent-charging/v1
  description: SAP API Business Hub - Production
- url: https://sandbox.api.sap.com/convergent-charging/v1
  description: SAP API Business Hub - Sandbox
security:
- OAuth2:
  - read
  - write
- ApiKeyAuth: []
tags:
- name: Subscription Items
  description: Management of individual items within a subscription
paths:
  /subscriptions/{subscriptionId}/items:
    get:
      operationId: listSubscriptionItems
      summary: SAP BRIM (Billing and Revenue Innovation Management) List subscription items
      description: Retrieves all items within a subscription, including their quantities, pricing, and status.
      tags:
      - Subscription Items
      parameters:
      - $ref: '#/components/parameters/SubscriptionId'
      responses:
        '200':
          description: List of subscription items
          content:
            application/json:
              schema:
                type: object
                properties:
                  results:
                    type: array
                    items:
                      $ref: '#/components/schemas/SubscriptionItem'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
    post:
      operationId: addSubscriptionItem
      summary: SAP BRIM (Billing and Revenue Innovation Management) Add an item to a subscription
      description: Adds a new line item to an existing subscription. The item is billed according to the subscription billing cycle.
      tags:
      - Subscription Items
      parameters:
      - $ref: '#/components/parameters/SubscriptionId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SubscriptionItemCreate'
      responses:
        '201':
          description: Item added to subscription
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SubscriptionItem'
        '400':
          $ref: '#/components/responses/BadRequest'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
  /subscriptions/{subscriptionId}/items/{itemId}:
    get:
      operationId: getSubscriptionItem
      summary: SAP BRIM (Billing and Revenue Innovation Management) Get a subscription item
      description: Retrieves details of a specific item within a subscription.
      tags:
      - Subscription Items
      parameters:
      - $ref: '#/components/parameters/SubscriptionId'
      - $ref: '#/components/parameters/ItemId'
      responses:
        '200':
          description: Subscription item details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SubscriptionItem'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
    patch:
      operationId: updateSubscriptionItem
      summary: SAP BRIM (Billing and Revenue Innovation Management) Update a subscription item
      description: Updates the quantity or configuration of a subscription item.
      tags:
      - Subscription Items
      parameters:
      - $ref: '#/components/parameters/SubscriptionId'
      - $ref: '#/components/parameters/ItemId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                quantity:
                  type: integer
                  minimum: 1
                metadata:
                  type: object
                  additionalProperties:
                    type: string
      responses:
        '200':
          description: Item updated
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SubscriptionItem'
        '400':
          $ref: '#/components/responses/BadRequest'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
    delete:
      operationId: removeSubscriptionItem
      summary: SAP BRIM (Billing and Revenue Innovation Management) Remove a subscription item
      description: Removes an item from a subscription. Prorated credits may be applied to the next billing cycle.
      tags:
      - Subscription Items
      parameters:
      - $ref: '#/components/parameters/SubscriptionId'
      - $ref: '#/components/parameters/ItemId'
      responses:
        '204':
          description: Item removed from subscription
        '400':
          $ref: '#/components/responses/BadRequest'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
components:
  responses:
    InternalServerError:
      description: Internal server error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    BadRequest:
      description: Invalid request parameters
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Unauthorized:
      description: Authentication required or invalid credentials
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  parameters:
    SubscriptionId:
      name: subscriptionId
      in: path
      required: true
      description: Unique identifier of the subscription
      schema:
        type: string
        format: uuid
    ItemId:
      name: itemId
      in: path
      required: true
      description: Unique identifier of the subscription item
      schema:
        type: string
  schemas:
    ErrorResponse:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
            message:
              type: string
            target:
              type: string
            details:
              type: array
              items:
                type: object
                properties:
                  code:
                    type: string
                  message:
                    type: string
    SubscriptionItemCreate:
      type: object
      required:
      - productId
      - quantity
      properties:
        productId:
          type: string
        quantity:
          type: integer
          minimum: 1
        billingType:
          type: string
          enum:
          - RECURRING
          - ONE_TIME
          - USAGE_BASED
        metadata:
          type: object
          additionalProperties:
            type: string
    MonetaryAmount:
      type: object
      required:
      - value
      - currency
      properties:
        value:
          type: number
          format: double
        currency:
          type: string
          pattern: ^[A-Z]{3}$
          description: ISO 4217 currency code
    SubscriptionItem:
      type: object
      properties:
        itemId:
          type: string
        productId:
          type: string
        productName:
          type: string
        description:
          type: string
        quantity:
          type: integer
          minimum: 1
        unitPrice:
          $ref: '#/components/schemas/MonetaryAmount'
        totalPrice:
          $ref: '#/components/schemas/MonetaryAmount'
        billingType:
          type: string
          enum:
          - RECURRING
          - ONE_TIME
          - USAGE_BASED
        includedUnits:
          type: integer
          description: Number of units included in the base price
        overageRate:
          type: number
          format: double
          description: Rate per unit above the included quantity
        metadata:
          type: object
          additionalProperties:
            type: string
  securitySchemes:
    OAuth2:
      type: oauth2
      flows:
        clientCredentials:
          tokenUrl: https://auth.sap.com/oauth/token
          scopes:
            read: Read access to charging and rating resources
            write: Write access to charging and rating resources
    ApiKeyAuth:
      type: apiKey
      in: header
      name: APIKey