openapi: 3.1.0
info:
  title: SAP Sales and Distribution (SD) SAP Billing Document Sales Inquiry 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: Sales Inquiry
  description: Operations on sales inquiry header (A_SalesInquiry)
paths:
  /A_SalesInquiry:
    get:
      operationId: listSalesInquiries
      summary: Retrieve a list of sales inquiries
      description: Returns a collection of sales inquiry headers. Supports filtering by inquiry type, date, customer, and status.
      tags:
      - Sales Inquiry
      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 sales inquiries
          content:
            application/json:
              schema:
                type: object
                properties:
                  d:
                    type: object
                    properties:
                      results:
                        type: array
                        items:
                          $ref: '#/components/schemas/SalesInquiry'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '500':
          $ref: '#/components/responses/InternalServerError'
    post:
      operationId: createSalesInquiry
      summary: Create a new sales inquiry
      description: Creates a new sales inquiry with deep insert support for items and partners.
      tags:
      - Sales Inquiry
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SalesInquiryCreate'
      responses:
        '201':
          description: Sales inquiry successfully created
          content:
            application/json:
              schema:
                type: object
                properties:
                  d:
                    $ref: '#/components/schemas/SalesInquiry'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '500':
          $ref: '#/components/responses/InternalServerError'
  /A_SalesInquiry('{SalesInquiry}'):
    get:
      operationId: getSalesInquiry
      summary: Retrieve a single sales inquiry
      description: Returns a single sales inquiry by its document number.
      tags:
      - Sales Inquiry
      parameters:
      - name: SalesInquiry
        in: path
        required: true
        description: Sales inquiry number (10 characters)
        schema:
          type: string
          maxLength: 10
      - $ref: '#/components/parameters/select'
      - $ref: '#/components/parameters/expand'
      responses:
        '200':
          description: Successfully retrieved the sales inquiry
          content:
            application/json:
              schema:
                type: object
                properties:
                  d:
                    $ref: '#/components/schemas/SalesInquiry'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
    patch:
      operationId: updateSalesInquiry
      summary: Update a sales inquiry
      description: Updates an existing sales inquiry header.
      tags:
      - Sales Inquiry
      parameters:
      - name: SalesInquiry
        in: path
        required: true
        description: Sales inquiry number
        schema:
          type: string
          maxLength: 10
      - $ref: '#/components/parameters/ifMatch'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SalesInquiryUpdate'
      responses:
        '204':
          description: Sales inquiry successfully updated
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
    delete:
      operationId: deleteSalesInquiry
      summary: Delete a sales inquiry
      description: Deletes an existing sales inquiry.
      tags:
      - Sales Inquiry
      parameters:
      - name: SalesInquiry
        in: path
        required: true
        description: Sales inquiry number
        schema:
          type: string
          maxLength: 10
      - $ref: '#/components/parameters/ifMatch'
      responses:
        '204':
          description: Sales inquiry successfully deleted
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
components:
  schemas:
    SalesInquiryItemCreate:
      type: object
      properties:
        Material:
          type: string
          maxLength: 40
        RequestedQuantity:
          type: string
        RequestedQuantityUnit:
          type: string
          maxLength: 3
    SalesInquiry:
      type: object
      description: Sales inquiry header entity (A_SalesInquiry)
      properties:
        SalesInquiry:
          type: string
          maxLength: 10
          description: Sales inquiry number
        SalesInquiryType:
          type: string
          maxLength: 4
          description: Sales document type
        SalesOrganization:
          type: string
          maxLength: 4
          description: Sales organization
        DistributionChannel:
          type: string
          maxLength: 2
          description: Distribution channel
        OrganizationDivision:
          type: string
          maxLength: 2
          description: Division
        SoldToParty:
          type: string
          maxLength: 10
          description: Sold-to party
        CreationDate:
          type: string
          format: date
          description: Creation date
        SalesInquiryDate:
          type: string
          format: date
          description: Document date
        BindingPeriodValidityStartDate:
          type: string
          format: date
          description: Valid-from date
        BindingPeriodValidityEndDate:
          type: string
          format: date
          description: Valid-to date
        TotalNetAmount:
          type: string
          description: Net value in document currency
        TransactionCurrency:
          type: string
          maxLength: 5
          description: Document currency
        SDDocumentReason:
          type: string
          maxLength: 3
          description: Order reason
        PurchaseOrderByCustomer:
          type: string
          maxLength: 35
          description: Customer reference
        OverallSDProcessStatus:
          type: string
          maxLength: 1
          description: Overall processing status
    SalesInquiryUpdate:
      type: object
      properties:
        PurchaseOrderByCustomer:
          type: string
          maxLength: 35
        BindingPeriodValidityEndDate:
          type: string
          format: date
    SalesInquiryCreate:
      type: object
      required:
      - SalesInquiryType
      - SalesOrganization
      - DistributionChannel
      - OrganizationDivision
      properties:
        SalesInquiryType:
          type: string
          maxLength: 4
        SalesOrganization:
          type: string
          maxLength: 4
        DistributionChannel:
          type: string
          maxLength: 2
        OrganizationDivision:
          type: string
          maxLength: 2
        SoldToParty:
          type: string
          maxLength: 10
        SalesInquiryDate:
          type: string
          format: date
        to_Item:
          type: object
          properties:
            results:
              type: array
              items:
                $ref: '#/components/schemas/SalesInquiryItemCreate'
    Error:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
            message:
              type: object
              properties:
                lang:
                  type: string
                value:
                  type: string
  parameters:
    filter:
      name: $filter
      in: query
      schema:
        type: string
    skip:
      name: $skip
      in: query
      schema:
        type: integer
        minimum: 0
    select:
      name: $select
      in: query
      schema:
        type: string
    orderby:
      name: $orderby
      in: query
      schema:
        type: string
    ifMatch:
      name: If-Match
      in: header
      required: true
      schema:
        type: string
    expand:
      name: $expand
      in: query
      schema:
        type: string
    top:
      name: $top
      in: query
      schema:
        type: integer
        minimum: 0
    inlinecount:
      name: $inlinecount
      in: query
      schema:
        type: string
        enum:
        - allpages
        - none
  responses:
    InternalServerError:
      description: Internal server error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    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'
  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