openapi: 3.1.0
info:
  title: SAP Sales and Distribution (SD) SAP Billing Document API
  description: >-
    Read, cancel, and retrieve billing documents in PDF format from SAP S/4HANA.
    This OData service (API_BILLING_DOCUMENT_SRV) provides access to billing
    document headers, items, partners, and pricing elements. Supports invoices,
    credit memos, debit memos, and other billing document types as part of the
    order-to-cash cycle.
  version: 1.0.0
  contact:
    name: SAP Support
    url: https://support.sap.com
  license:
    name: SAP Developer License
    url: https://www.sap.com/about/agreements/product-use-and-support-terms.html
servers:
  - url: https://sandbox.api.sap.com/s4hanacloud/sap/opu/odata/sap/API_BILLING_DOCUMENT_SRV
    description: SAP S/4HANA Cloud Sandbox
  - url: https://{host}:{port}/sap/opu/odata/sap/API_BILLING_DOCUMENT_SRV
    description: SAP S/4HANA On-Premise
    variables:
      host:
        default: localhost
      port:
        default: '443'
security:
  - basicAuth: []
  - oauth2: []
tags:
  - name: Billing Document
    description: Operations on billing document header (A_BillingDocument)
  - name: Billing Document Item
    description: Operations on billing document items (A_BillingDocumentItem)
  - name: Billing Document Partner
    description: Operations on billing document partners (A_BillingDocumentPartner)
paths:
  /A_BillingDocument:
    get:
      operationId: listBillingDocuments
      summary: Retrieve a list of billing documents
      description: >-
        Returns a collection of billing document headers. Use OData query
        options to filter by billing date, billing type, sales organization,
        customer, or cancellation status.
      tags:
        - Billing Document
      parameters:
        - $ref: '#/components/parameters/top'
        - $ref: '#/components/parameters/skip'
        - $ref: '#/components/parameters/filter'
        - $ref: '#/components/parameters/orderby'
        - $ref: '#/components/parameters/select'
        - $ref: '#/components/parameters/expand'
        - $ref: '#/components/parameters/inlinecount'
      responses:
        '200':
          description: Successfully retrieved billing documents
          content:
            application/json:
              schema:
                type: object
                properties:
                  d:
                    type: object
                    properties:
                      results:
                        type: array
                        items:
                          $ref: '#/components/schemas/BillingDocument'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '500':
          $ref: '#/components/responses/InternalServerError'
  /A_BillingDocument('{BillingDocument}'):
    get:
      operationId: getBillingDocument
      summary: Retrieve a single billing document
      description: >-
        Returns a single billing document header by its key. Use $expand to
        include related items, partners, and pricing elements.
      tags:
        - Billing Document
      parameters:
        - name: BillingDocument
          in: path
          required: true
          description: Billing document number (10 characters)
          schema:
            type: string
            maxLength: 10
        - $ref: '#/components/parameters/select'
        - $ref: '#/components/parameters/expand'
      responses:
        '200':
          description: Successfully retrieved the billing document
          content:
            application/json:
              schema:
                type: object
                properties:
                  d:
                    $ref: '#/components/schemas/BillingDocument'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
  /A_BillingDocument('{BillingDocument}')/to_Item:
    get:
      operationId: listBillingDocumentItems
      summary: Retrieve items for a billing document
      description: >-
        Returns a collection of line items for the specified billing document.
      tags:
        - Billing Document Item
      parameters:
        - name: BillingDocument
          in: path
          required: true
          description: Billing document number
          schema:
            type: string
            maxLength: 10
        - $ref: '#/components/parameters/top'
        - $ref: '#/components/parameters/skip'
        - $ref: '#/components/parameters/filter'
        - $ref: '#/components/parameters/select'
      responses:
        '200':
          description: Successfully retrieved billing document items
          content:
            application/json:
              schema:
                type: object
                properties:
                  d:
                    type: object
                    properties:
                      results:
                        type: array
                        items:
                          $ref: '#/components/schemas/BillingDocumentItem'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
  /A_BillingDocument('{BillingDocument}')/to_Partner:
    get:
      operationId: listBillingDocumentPartners
      summary: Retrieve partners for a billing document
      description: >-
        Returns a collection of business partners associated with the billing
        document.
      tags:
        - Billing Document Partner
      parameters:
        - name: BillingDocument
          in: path
          required: true
          description: Billing document number
          schema:
            type: string
            maxLength: 10
        - $ref: '#/components/parameters/top'
        - $ref: '#/components/parameters/skip'
        - $ref: '#/components/parameters/select'
      responses:
        '200':
          description: Successfully retrieved billing document partners
          content:
            application/json:
              schema:
                type: object
                properties:
                  d:
                    type: object
                    properties:
                      results:
                        type: array
                        items:
                          $ref: '#/components/schemas/BillingDocumentPartner'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
  /CancelBillingDocument:
    post:
      operationId: cancelBillingDocument
      summary: Cancel a billing document
      description: >-
        Cancels a billing document by creating a cancellation document. The
        original document is flagged as cancelled and a new reversal document
        is generated.
      tags:
        - Billing Document
      parameters:
        - name: BillingDocument
          in: query
          required: true
          description: Billing document number to cancel
          schema:
            type: string
            maxLength: 10
      responses:
        '200':
          description: Billing document successfully cancelled
          content:
            application/json:
              schema:
                type: object
                properties:
                  d:
                    $ref: '#/components/schemas/BillingDocument'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '500':
          $ref: '#/components/responses/InternalServerError'
  /GetPDF:
    get:
      operationId: getBillingDocumentPDF
      summary: Retrieve a billing document as PDF
      description: >-
        Returns the billing document output as a PDF binary stream. The PDF
        is generated based on the configured output type and form.
      tags:
        - Billing Document
      parameters:
        - name: BillingDocument
          in: query
          required: true
          description: Billing document number
          schema:
            type: string
            maxLength: 10
      responses:
        '200':
          description: PDF document successfully retrieved
          content:
            application/pdf:
              schema:
                type: string
                format: binary
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
components:
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
    oauth2:
      type: oauth2
      flows:
        clientCredentials:
          tokenUrl: https://{tenant}.authentication.{landscape}.hana.ondemand.com/oauth/token
          scopes:
            API_BILLING_DOCUMENT_SRV: Access to Billing Document API
  parameters:
    top:
      name: $top
      in: query
      description: Maximum number of records to return
      schema:
        type: integer
        minimum: 0
    skip:
      name: $skip
      in: query
      description: Number of records to skip
      schema:
        type: integer
        minimum: 0
    filter:
      name: $filter
      in: query
      description: OData filter expression
      schema:
        type: string
    orderby:
      name: $orderby
      in: query
      description: Sort order
      schema:
        type: string
    select:
      name: $select
      in: query
      description: Comma-separated properties to include
      schema:
        type: string
    expand:
      name: $expand
      in: query
      description: Navigation properties to expand
      schema:
        type: string
    inlinecount:
      name: $inlinecount
      in: query
      description: Include total count
      schema:
        type: string
        enum:
          - allpages
          - none
    ifMatch:
      name: If-Match
      in: header
      description: ETag value for concurrency control
      required: true
      schema:
        type: string
  schemas:
    BillingDocument:
      type: object
      description: Billing document header entity (A_BillingDocument)
      properties:
        BillingDocument:
          type: string
          maxLength: 10
          description: Billing document number
        BillingDocumentType:
          type: string
          maxLength: 4
          description: Billing document type (F2=Invoice, G2=Credit Memo, L2=Debit Memo)
        BillingDocumentCategory:
          type: string
          maxLength: 1
          description: Billing document category
        SDDocumentCategory:
          type: string
          maxLength: 4
          description: SD document category
        BillingDocumentDate:
          type: string
          format: date
          description: Billing date
        CreationDate:
          type: string
          format: date
          description: Date the document was created
        CreationTime:
          type: string
          description: Time the document was created
        LastChangeDate:
          type: string
          format: date
          description: Date of last change
        LastChangeDateTime:
          type: string
          format: date-time
          description: Timestamp of last change
        SalesOrganization:
          type: string
          maxLength: 4
          description: Sales organization
        DistributionChannel:
          type: string
          maxLength: 2
          description: Distribution channel
        Division:
          type: string
          maxLength: 2
          description: Division
        SoldToParty:
          type: string
          maxLength: 10
          description: Sold-to party
        PayerParty:
          type: string
          maxLength: 10
          description: Payer
        TotalNetAmount:
          type: string
          description: Net value in document currency
        TotalGrossAmount:
          type: string
          description: Gross value in document currency
        TransactionCurrency:
          type: string
          maxLength: 5
          description: SD document currency
        TotalTaxAmount:
          type: string
          description: Tax amount in document currency
        CustomerPaymentTerms:
          type: string
          maxLength: 4
          description: Terms of payment key
        PaymentMethod:
          type: string
          maxLength: 1
          description: Payment method
        BillingDocumentIsCancelled:
          type: boolean
          description: Indicates if the billing document is cancelled
        CancelledBillingDocument:
          type: string
          maxLength: 10
          description: Cancelled billing document number
        AccountingDocument:
          type: string
          maxLength: 10
          description: Accounting document number
        AccountingPostingStatus:
          type: string
          maxLength: 1
          description: Accounting posting status
        IncotermsClassification:
          type: string
          maxLength: 3
          description: Incoterms (part 1)
        CompanyCode:
          type: string
          maxLength: 4
          description: Company code
    BillingDocumentItem:
      type: object
      description: Billing document item entity (A_BillingDocumentItem)
      properties:
        BillingDocument:
          type: string
          maxLength: 10
          description: Billing document number
        BillingDocumentItem:
          type: string
          maxLength: 6
          description: Billing item number
        Material:
          type: string
          maxLength: 40
          description: Material number
        Plant:
          type: string
          maxLength: 4
          description: Plant
        BillingQuantity:
          type: string
          description: Billing quantity in sales unit
        BillingQuantityUnit:
          type: string
          maxLength: 3
          description: Sales unit
        NetAmount:
          type: string
          description: Net value of the item
        GrossAmount:
          type: string
          description: Gross value of the item
        TaxAmount:
          type: string
          description: Tax amount
        TransactionCurrency:
          type: string
          maxLength: 5
          description: SD document currency
        SalesDocument:
          type: string
          maxLength: 10
          description: Reference sales document
        SalesDocumentItem:
          type: string
          maxLength: 6
          description: Reference sales document item
        ReferenceSDDocument:
          type: string
          maxLength: 10
          description: Reference delivery document
        ReferenceSDDocumentItem:
          type: string
          maxLength: 6
          description: Reference delivery item
        MaterialGroup:
          type: string
          maxLength: 9
          description: Material group
        Batch:
          type: string
          maxLength: 10
          description: Batch number
    BillingDocumentPartner:
      type: object
      description: Billing document partner entity (A_BillingDocumentPartner)
      properties:
        BillingDocument:
          type: string
          maxLength: 10
          description: Billing document number
        PartnerFunction:
          type: string
          maxLength: 2
          description: Partner function
        Customer:
          type: string
          maxLength: 10
          description: Customer number
        Supplier:
          type: string
          maxLength: 10
          description: Vendor account number
    Error:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
            message:
              type: object
              properties:
                lang:
                  type: string
                value:
                  type: string
  responses:
    BadRequest:
      description: Bad request
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Authentication required
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    InternalServerError:
      description: Internal server error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'