Microsoft Project Timesheets API

openapi: 3.0.3
info:
  title: Microsoft Project Online REST Assignments Timesheets API
  description: REST API for accessing and managing Microsoft Project Online and Project Server data including projects, tasks, resources, assignments, calendars, custom fields, timesheets, lookup tables, and workflow activities. Uses SharePoint-based REST endpoints via the ProjectServer service.
  version: '1.0'
  contact:
    name: Microsoft Project Support
    url: https://support.microsoft.com/
  license:
    name: Microsoft API License
    url: https://www.microsoft.com/en-us/legal/terms-of-use
  x-generated-from: documentation
  x-last-validated: '2026-04-18'
servers:
- url: https://{tenant}.sharepoint.com/sites/pwa/_api/ProjectServer
  description: Project Online REST API
  variables:
    tenant:
      default: contoso
      description: SharePoint tenant name
security:
- oauth2: []
tags:
- name: Timesheets
  description: Manage timesheet periods, lines, and work entries
paths:
  /TimeSheetPeriods:
    get:
      operationId: listTimeSheetPeriods
      summary: Microsoft Project List Timesheet Periods
      description: Retrieve all timesheet periods.
      tags:
      - Timesheets
      responses:
        '200':
          description: List of timesheet periods
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TimeSheetPeriodCollection'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /TimeSheetPeriods('{periodId}')/TimeSheet:
    get:
      operationId: getTimeSheet
      summary: Microsoft Project Get Timesheet
      description: Retrieve a timesheet for a specific period.
      tags:
      - Timesheets
      parameters:
      - $ref: '#/components/parameters/periodId'
      responses:
        '200':
          description: Timesheet details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TimeSheet'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /TimeSheetPeriods('{periodId}')/TimeSheet/Lines:
    get:
      operationId: listTimeSheetLines
      summary: Microsoft Project List Timesheet Lines
      description: Retrieve all lines in a timesheet.
      tags:
      - Timesheets
      parameters:
      - $ref: '#/components/parameters/periodId'
      responses:
        '200':
          description: List of timesheet lines
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TimeSheetLineCollection'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
    post:
      operationId: createTimeSheetLine
      summary: Microsoft Project Create Timesheet Line
      description: Create a new line in a timesheet.
      tags:
      - Timesheets
      parameters:
      - $ref: '#/components/parameters/periodId'
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TimeSheetLineCreate'
      responses:
        '201':
          description: Timesheet line created
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /TimeSheetPeriods('{periodId}')/TimeSheet/submitForApproval():
    post:
      operationId: submitTimeSheetForApproval
      summary: Microsoft Project Submit Timesheet for Approval
      description: Submit a timesheet for manager approval.
      tags:
      - Timesheets
      parameters:
      - $ref: '#/components/parameters/periodId'
      responses:
        '200':
          description: Timesheet submitted for approval
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
components:
  schemas:
    TimeSheetLineCollection:
      type: object
      properties:
        value:
          type: array
          items:
            $ref: '#/components/schemas/TimeSheetLine'
    TimeSheetLineCreate:
      type: object
      properties:
        LineClass:
          type: integer
          description: Line classification
          default: 0
        ProjectId:
          type: string
          format: uuid
          description: Project ID
        TaskId:
          type: string
          format: uuid
          description: Task ID
    TimeSheetLine:
      type: object
      properties:
        Id:
          type: string
          format: uuid
          description: Line identifier
        LineClass:
          type: integer
          description: Line classification (0=StandardLine, 1=SickTimeLine, 2=VacationTimeLine, 3=AdministrativeTimeLine)
          example: 0
        ProjectName:
          type: string
          description: Associated project name
          example: Enterprise Website Redesign
        TaskName:
          type: string
          description: Associated task name
          example: Design Review Meeting
        TotalWork:
          type: string
          description: Total work for this line
          example: 8h
        Comment:
          type: string
          description: Line comment
    TimeSheetPeriodCollection:
      type: object
      properties:
        value:
          type: array
          items:
            $ref: '#/components/schemas/TimeSheetPeriod'
    TimeSheetPeriod:
      type: object
      properties:
        Id:
          type: string
          format: uuid
          description: Period identifier
        Name:
          type: string
          description: Period name
          example: March 2026 - Week 1
        Start:
          type: string
          format: date-time
          description: Period start date
        End:
          type: string
          format: date-time
          description: Period end date
    TimeSheet:
      type: object
      properties:
        Id:
          type: string
          format: uuid
          description: Timesheet identifier
        Status:
          type: integer
          description: Timesheet status (0=InProgress, 1=Submitted, 2=Acceptable, 3=Approved, 4=Rejected)
          example: 0
        PeriodId:
          type: string
          format: uuid
          description: Associated period ID
        TotalWork:
          type: string
          description: Total work reported
          example: 40h
        TotalActualWork:
          type: string
          description: Total actual work
          example: 38h
  parameters:
    periodId:
      name: periodId
      in: path
      required: true
      description: The GUID identifier of the timesheet period
      schema:
        type: string
        format: uuid
  securitySchemes:
    oauth2:
      type: oauth2
      description: OAuth 2.0 authentication via Azure AD for SharePoint Online
      flows:
        authorizationCode:
          authorizationUrl: https://login.microsoftonline.com/common/oauth2/authorize
          tokenUrl: https://login.microsoftonline.com/common/oauth2/token
          scopes:
            ProjectServer.Read: Read Project Server data
            ProjectServer.ReadWrite: Read and write Project Server data