generated: '2026-07-18'
method: searched
source: https://compass.coupa.com/en-us/products/product-documentation/integration-technical-documentation/the-coupa-core-api/resources
api: Coupa Core API
note: >-
  Entity set and relationships derived from the documented Coupa Core API resource catalog and
  its nested-endpoint reference patterns. Coupa does not publish a machine-readable OpenAPI
  schema, so relationships reflect the documented object model rather than a spec derivation.
entities:
  - name: PurchaseOrder
    endpoint: /purchase_orders
    relationships:
      - type: has_many
        target: PurchaseOrderLine
        via: /purchase_orders/{id}/lines
      - type: belongs_to
        target: Supplier
        via: supplier
      - type: belongs_to
        target: Requisition
        via: requisition
  - name: Requisition
    endpoint: /requisitions
    relationships:
      - type: has_many
        target: RequisitionLine
        via: lines
      - type: belongs_to
        target: User
        via: requested_by
  - name: Invoice
    endpoint: /invoices
    relationships:
      - type: has_many
        target: InvoiceLine
        via: lines
      - type: belongs_to
        target: Supplier
        via: supplier
      - type: belongs_to
        target: PurchaseOrder
        via: purchase_order
  - name: Supplier
    endpoint: /suppliers
    relationships:
      - type: has_many
        target: Address
        via: /suppliers/{id}/addresses
      - type: has_many
        target: BusinessEntity
        via: business_entities
  - name: User
    endpoint: /users
    relationships:
      - type: belongs_to
        target: Department
        via: department
  - name: Expense
    endpoint: /expenses
    relationships:
      - type: belongs_to
        target: User
        via: user
  - name: Contract
    endpoint: /contracts
    relationships:
      - type: belongs_to
        target: Supplier
        via: supplier
  - name: Receipt
    endpoint: /receipts
    relationships:
      - type: belongs_to
        target: PurchaseOrder
        via: purchase_order
  - name: Account
    endpoint: /accounts
    relationships: []
  - name: Department
    endpoint: /departments
    relationships: []
  - name: BusinessEntity
    endpoint: /business_entities
    relationships: []
  - name: Address
    endpoint: /addresses
    relationships: []
reference_data:
  - Accounts
  - Addresses
  - Business Entities
  - Departments
  - Items
  - Projects
  - Suppliers
  - Users
  - Tax Registrations
  - Currencies
  - Exchange Rates
  - Payment Terms
transactional:
  - Purchase Orders
  - Requisitions
  - Invoices
  - Contracts
  - Expenses
  - Approvals
  - Receipts
  - Inventory Transactions
  - Advance Ship Notices
  - Work Confirmations