openapi: 3.1.0
info:
  title: SAP Concur Expense Report Allocations API
  description: The SAP Concur Expense Report v4 API enables integration with Concur Expense for creating, retrieving, updating, and managing expense reports, expenses (entries), allocations, comments, and workflow actions. This API follows RESTful conventions with JSON Merge Patch (RFC 7386) for partial updates and HATEOAS links for resource navigation.
  version: 4.0.0
  contact:
    name: SAP Concur Developer Support
    url: https://developer.concur.com/support/
  license:
    name: SAP Concur API Terms of Use
    url: https://www.concur.com/terms-of-use
  x-api-id: sap-concur-expense-report-v4
  x-audience: external-partner
servers:
- url: https://us.api.concursolutions.com
  description: US Production Datacenter
- url: https://us2.api.concursolutions.com
  description: US2 Production Datacenter
- url: https://emea.api.concursolutions.com
  description: EMEA Production Datacenter
- url: https://cn.api.concursolutions.com
  description: China Production Datacenter
security:
- bearerAuth: []
tags:
- name: Allocations
  description: Operations for retrieving and updating expense allocations, which distribute expense amounts across cost centers or accounts.
paths:
  /expensereports/v4/users/{userID}/context/{contextType}/reports/{reportId}/expenses/{expenseId}/allocations:
    get:
      operationId: getAllocations
      summary: Sap Concur Retrieve Allocations for an Expense
      description: Returns all allocations associated with a specific expense entry, showing how the expense amount is distributed across cost centers, departments, or accounts.
      tags:
      - Allocations
      parameters:
      - $ref: '#/components/parameters/userID'
      - $ref: '#/components/parameters/contextType'
      - $ref: '#/components/parameters/reportId'
      - $ref: '#/components/parameters/expenseId'
      responses:
        '200':
          description: Allocations retrieved successfully
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Allocation'
              examples:
                Getallocations200Example:
                  summary: Default getAllocations 200 response
                  x-microcks-default: true
                  value:
                  - allocationId: '500123'
                    expenseId: '500123'
                    accountCode: example_value
                    overLimitAccountCode: example_value
                    allocationAmount:
                      value: 42.5
                      currencyCode: example_value
                    approvedAmount:
                      value: 42.5
                      currencyCode: example_value
                    claimedAmount:
                      value: 42.5
                      currencyCode: example_value
                    percentage: 42.5
                    isSystemAllocation: true
                    isPercentEdited: true
                    customData:
                    - {}
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /expensereports/v4/users/{userID}/context/{contextType}/reports/{reportId}/allocations/{allocationId}:
    get:
      operationId: getAllocation
      summary: Sap Concur Retrieve a Single Allocation by Id
      description: Returns the full details of a specific allocation including account codes, amounts, percentage, and custom data fields.
      tags:
      - Allocations
      parameters:
      - $ref: '#/components/parameters/userID'
      - $ref: '#/components/parameters/contextType'
      - $ref: '#/components/parameters/reportId'
      - $ref: '#/components/parameters/allocationId'
      responses:
        '200':
          description: Allocation retrieved successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Allocation'
              examples:
                Getallocation200Example:
                  summary: Default getAllocation 200 response
                  x-microcks-default: true
                  value:
                    allocationId: '500123'
                    expenseId: '500123'
                    accountCode: example_value
                    overLimitAccountCode: example_value
                    allocationAmount:
                      value: 42.5
                      currencyCode: example_value
                    approvedAmount:
                      value: 42.5
                      currencyCode: example_value
                    claimedAmount:
                      value: 42.5
                      currencyCode: example_value
                    percentage: 42.5
                    isSystemAllocation: true
                    isPercentEdited: true
                    customData:
                    - id: abc123
                      value: example_value
                      isValid: '500123'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
    patch:
      operationId: updateAllocation
      summary: Sap Concur Update an Allocation
      description: Partially updates an allocation using JSON Merge Patch (RFC 7386). Typically used to update custom data fields on allocations. The request body includes the allocation update and the list of expense IDs to which the update applies.
      tags:
      - Allocations
      parameters:
      - $ref: '#/components/parameters/userID'
      - $ref: '#/components/parameters/contextTypeWritable'
      - $ref: '#/components/parameters/reportId'
      - $ref: '#/components/parameters/allocationId'
      requestBody:
        required: true
        content:
          application/merge-patch+json:
            schema:
              $ref: '#/components/schemas/UpdateAllocationRequest'
            examples:
              UpdateallocationRequestExample:
                summary: Default updateAllocation request
                x-microcks-default: true
                value:
                  allocation:
                    customData:
                    - {}
                  expenseIds:
                  - example_value
      responses:
        '204':
          description: Allocation updated successfully
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
components:
  schemas:
    Amount:
      type: object
      description: A monetary amount with its currency code
      required:
      - value
      - currencyCode
      properties:
        value:
          type: number
          format: double
          description: The numeric monetary amount
          examples:
          - 250.0
        currencyCode:
          type: string
          description: ISO 4217 three-letter currency code
          minLength: 3
          maxLength: 3
          examples:
          - USD
    CustomData:
      type: object
      description: A custom field value configured by the organization. Field IDs follow patterns like custom1-custom40 and orgUnit1-orgUnit6.
      required:
      - id
      properties:
        id:
          type: string
          description: The identifier of the custom field (e.g., custom1, orgUnit1)
          examples:
          - custom1
        value:
          type: string
          description: The value assigned to the custom field
          maxLength: 48
          examples:
          - Marketing Department
        isValid:
          type: boolean
          description: Whether the current value passes validation rules
          example: '500123'
    ErrorResponse:
      type: object
      description: Standard error response
      properties:
        errorId:
          type: string
          description: Unique identifier for this error occurrence
          example: '500123'
        errorMessage:
          type: string
          description: Human-readable error description
          example: example_value
        httpStatus:
          type: string
          description: The HTTP status code as a string
          example: example_value
        path:
          type: string
          description: The request path that triggered the error
          example: example_value
        timestamp:
          type: string
          format: date-time
          description: When the error occurred
          example: '2026-01-15T10:30:00Z'
        validationErrors:
          type: array
          description: Detailed field-level validation failures
          items:
            type: object
            properties:
              source:
                type: string
                description: The field or parameter that failed validation
              message:
                type: string
                description: Description of the validation failure
          example: []
    UpdateAllocationRequest:
      type: object
      description: Request body for updating an allocation
      properties:
        allocation:
          type: object
          description: The allocation fields to update
          properties:
            customData:
              type: array
              items:
                $ref: '#/components/schemas/CustomData'
          example: example_value
        expenseIds:
          type: array
          description: The expense IDs to which this update applies
          items:
            type: string
          example: []
    Allocation:
      type: object
      description: An expense allocation that distributes an expense amount across cost centers, departments, or general ledger accounts.
      required:
      - allocationId
      - expenseId
      - percentage
      - isSystemAllocation
      - isPercentEdited
      properties:
        allocationId:
          type: string
          description: Unique identifier of the allocation
          example: '500123'
        expenseId:
          type: string
          description: The expense this allocation belongs to
          example: '500123'
        accountCode:
          type: string
          description: The ledger account code
          example: example_value
        overLimitAccountCode:
          type: string
          description: Account code for amounts exceeding policy limits
          example: example_value
        allocationAmount:
          $ref: '#/components/schemas/Amount'
        approvedAmount:
          $ref: '#/components/schemas/Amount'
        claimedAmount:
          $ref: '#/components/schemas/Amount'
        percentage:
          type: number
          format: double
          description: The percentage of the total expense allocated (0-100)
          minimum: 0
          maximum: 100
          example: 42.5
        isSystemAllocation:
          type: boolean
          description: Whether this allocation was automatically created by the system (true) or manually created by a user (false)
          example: true
        isPercentEdited:
          type: boolean
          description: Whether the allocation percentage has been modified
          example: true
        customData:
          type: array
          description: Custom field values on the allocation
          items:
            $ref: '#/components/schemas/CustomData'
          example: []
  responses:
    Forbidden:
      description: The authenticated user does not have the required scope or permission to perform this operation.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    NotFound:
      description: The requested resource (report, expense, allocation, or user) was not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Unauthorized:
      description: Authentication failed. The bearer token is missing, expired, or invalid.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    BadRequest:
      description: The request was malformed or contained invalid parameters. Check the validationErrors array for field-level details.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    InternalServerError:
      description: An unexpected server error occurred. Retry the request or contact SAP Concur support with the Concur-CorrelationId header.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  parameters:
    contextType:
      name: contextType
      in: path
      required: true
      description: The access context for the request. TRAVELER for the report owner, MANAGER for an approver, PROXY for a delegate.
      schema:
        type: string
        enum:
        - TRAVELER
        - MANAGER
        - PROXY
    reportId:
      name: reportId
      in: path
      required: true
      description: The unique identifier of the expense report
      schema:
        type: string
    contextTypeWritable:
      name: contextType
      in: path
      required: true
      description: The access context for write operations. TRAVELER for the report owner or PROXY for a delegate acting on behalf of the owner.
      schema:
        type: string
        enum:
        - TRAVELER
        - PROXY
    expenseId:
      name: expenseId
      in: path
      required: true
      description: The unique identifier of the expense entry
      schema:
        type: string
    userID:
      name: userID
      in: path
      required: true
      description: The unique identifier (UUID) of the SAP Concur user. Obtain via the Identity v4 API.
      schema:
        type: string
        format: uuid
    allocationId:
      name: allocationId
      in: path
      required: true
      description: The unique identifier of the allocation
      schema:
        type: string
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: OAuth 2.0 Bearer token. Obtain tokens via the SAP Concur Authentication API using either Company or User level grants. Required scopes vary by operation.