openapi: 3.1.0
info:
  title: Workday Finance Procurement API
  description: >-
    API for procurement operations including purchase requisitions, purchase orders,
    supplier management, supplier invoices, business assets, and the procure-to-pay
    lifecycle within Workday Financial Management.
  version: v45.2
  contact:
    name: Workday API Support
    email: api-support@workday.com
  termsOfService: https://www.workday.com/en-us/legal.html
externalDocs:
  description: Workday Resource Management API Documentation
  url: https://community.workday.com/sites/default/files/file-hosting/productionapi/Resource_Management/v45.2/index.html
servers:
  - url: https://wd2-impl-services1.workday.com/ccx/api/resource-management/v45.2/{tenant}
    description: Workday Procurement API Server
    variables:
      tenant:
        default: mycompany
        description: Workday tenant name
security:
  - bearerAuth: []
tags:
  - name: Suppliers
    description: Supplier account management
  - name: Purchase Orders
    description: Purchase order creation and management
  - name: Supplier Invoices
    description: Supplier invoice processing
  - name: Requisitions
    description: Purchase requisition management
paths:
  /suppliers:
    get:
      operationId: listSuppliers
      summary: List Suppliers
      description: Returns a collection of supplier accounts in the tenant.
      tags:
        - Suppliers
      parameters:
        - $ref: '#/components/parameters/limit'
        - $ref: '#/components/parameters/offset'
      responses:
        '200':
          description: Collection of suppliers returned successfully
          content:
            application/json:
              schema:
                type: object
                properties:
                  total:
                    type: integer
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/Supplier'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /suppliers/{supplierId}:
    get:
      operationId: getSupplier
      summary: Get Supplier
      description: Returns details of a specific supplier account.
      tags:
        - Suppliers
      parameters:
        - $ref: '#/components/parameters/supplierId'
      responses:
        '200':
          description: Supplier details returned successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Supplier'
        '404':
          $ref: '#/components/responses/NotFound'
  /purchaseOrders:
    get:
      operationId: listPurchaseOrders
      summary: List Purchase Orders
      description: Returns a collection of purchase orders.
      tags:
        - Purchase Orders
      parameters:
        - $ref: '#/components/parameters/limit'
        - $ref: '#/components/parameters/offset'
        - name: status
          in: query
          description: Filter by purchase order status
          schema:
            type: string
      responses:
        '200':
          description: Collection of purchase orders returned successfully
          content:
            application/json:
              schema:
                type: object
                properties:
                  total:
                    type: integer
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/PurchaseOrder'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createPurchaseOrder
      summary: Create Purchase Order
      description: Creates a new purchase order.
      tags:
        - Purchase Orders
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PurchaseOrderCreate'
      responses:
        '201':
          description: Purchase order created successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PurchaseOrder'
        '400':
          $ref: '#/components/responses/BadRequest'
  /purchaseOrders/{purchaseOrderId}:
    get:
      operationId: getPurchaseOrder
      summary: Get Purchase Order
      description: Returns details of a specific purchase order.
      tags:
        - Purchase Orders
      parameters:
        - $ref: '#/components/parameters/purchaseOrderId'
      responses:
        '200':
          description: Purchase order details returned successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PurchaseOrder'
        '404':
          $ref: '#/components/responses/NotFound'
  /supplierInvoices:
    get:
      operationId: listSupplierInvoices
      summary: List Supplier Invoices
      description: Returns a collection of supplier invoices.
      tags:
        - Supplier Invoices
      parameters:
        - $ref: '#/components/parameters/limit'
        - $ref: '#/components/parameters/offset'
        - name: status
          in: query
          description: Filter by invoice status
          schema:
            type: string
      responses:
        '200':
          description: Collection of supplier invoices returned successfully
          content:
            application/json:
              schema:
                type: object
                properties:
                  total:
                    type: integer
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/SupplierInvoice'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createSupplierInvoice
      summary: Create Supplier Invoice
      description: Creates a new supplier invoice for processing.
      tags:
        - Supplier Invoices
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SupplierInvoiceCreate'
      responses:
        '201':
          description: Supplier invoice created successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SupplierInvoice'
        '400':
          $ref: '#/components/responses/BadRequest'
  /requisitions:
    get:
      operationId: listRequisitions
      summary: List Purchase Requisitions
      description: Returns a collection of purchase requisitions.
      tags:
        - Requisitions
      parameters:
        - $ref: '#/components/parameters/limit'
        - $ref: '#/components/parameters/offset'
      responses:
        '200':
          description: Collection of requisitions returned successfully
          content:
            application/json:
              schema:
                type: object
                properties:
                  total:
                    type: integer
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/Requisition'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
  parameters:
    limit:
      name: limit
      in: query
      description: Maximum number of results to return
      schema:
        type: integer
        default: 20
        maximum: 100
    offset:
      name: offset
      in: query
      description: Number of results to skip for pagination
      schema:
        type: integer
        default: 0
    supplierId:
      name: supplierId
      in: path
      required: true
      description: The unique identifier of the supplier
      schema:
        type: string
    purchaseOrderId:
      name: purchaseOrderId
      in: path
      required: true
      description: The unique identifier of the purchase order
      schema:
        type: string
  responses:
    BadRequest:
      description: Invalid request parameters
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Unauthorized:
      description: Authentication required
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  schemas:
    ErrorResponse:
      type: object
      properties:
        error:
          type: string
        message:
          type: string
    ResourceReference:
      type: object
      properties:
        id:
          type: string
        descriptor:
          type: string
        href:
          type: string
          format: uri
    Supplier:
      type: object
      properties:
        id:
          type: string
          description: Supplier unique identifier
        descriptor:
          type: string
          description: Supplier display name
        name:
          type: string
        supplierNumber:
          type: string
        status:
          type: string
          enum: [active, inactive]
        taxId:
          type: string
        paymentTerms:
          type: string
        href:
          type: string
          format: uri
    PurchaseOrder:
      type: object
      properties:
        id:
          type: string
        descriptor:
          type: string
        purchaseOrderNumber:
          type: string
        status:
          type: string
          enum: [draft, submitted, approved, received, closed]
        supplier:
          $ref: '#/components/schemas/ResourceReference'
        totalAmount:
          type: number
          format: double
        currency:
          type: string
        orderDate:
          type: string
          format: date
        lines:
          type: array
          items:
            type: object
            properties:
              lineNumber:
                type: integer
              item:
                type: string
              quantity:
                type: number
              unitCost:
                type: number
              totalCost:
                type: number
        href:
          type: string
          format: uri
    PurchaseOrderCreate:
      type: object
      required: [supplier]
      properties:
        supplier:
          type: string
          description: Supplier identifier
        orderDate:
          type: string
          format: date
        lines:
          type: array
          items:
            type: object
            properties:
              item:
                type: string
              quantity:
                type: number
              unitCost:
                type: number
    SupplierInvoice:
      type: object
      properties:
        id:
          type: string
        descriptor:
          type: string
        invoiceNumber:
          type: string
        status:
          type: string
          enum: [draft, submitted, approved, paid, cancelled]
        supplier:
          $ref: '#/components/schemas/ResourceReference'
        invoiceDate:
          type: string
          format: date
        dueDate:
          type: string
          format: date
        totalAmount:
          type: number
          format: double
        currency:
          type: string
        purchaseOrder:
          $ref: '#/components/schemas/ResourceReference'
        href:
          type: string
          format: uri
    SupplierInvoiceCreate:
      type: object
      required: [supplier, invoiceNumber, totalAmount]
      properties:
        supplier:
          type: string
        invoiceNumber:
          type: string
        invoiceDate:
          type: string
          format: date
        dueDate:
          type: string
          format: date
        totalAmount:
          type: number
        currency:
          type: string
    Requisition:
      type: object
      properties:
        id:
          type: string
        descriptor:
          type: string
        requisitionNumber:
          type: string
        status:
          type: string
          enum: [draft, submitted, approved, ordered, received]
        requester:
          $ref: '#/components/schemas/ResourceReference'
        submitDate:
          type: string
          format: date
        totalAmount:
          type: number
          format: double
        currency:
          type: string
        href:
          type: string
          format: uri