Microsoft Project APIs

aid: ms-projects
name: Microsoft Project APIs
description: APIs for Microsoft Project, including Project for the web, Project Online, and Project Server.
type: Index
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/ms-projects.png
tags:
- Collaboration
- Microsoft 365
- Project Management
- Resources
- Scheduling
- Tasks
created: '2024-01-15'
modified: '2026-04-28'
url: https://www.microsoft.com/en-us/microsoft-365/project
specificationVersion: '0.19'
apis:
- name: Microsoft Project Online API
  description: REST API for accessing and managing Project Online data, including projects, tasks, resources, and assignments.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.microsoft.com/en-us/project/
  baseURL: https://graph.microsoft.com/v1.0/
  tags:
  - Project Online
  - REST
  - SharePoint
  - Tasks
  properties:
  - type: Documentation
    url: https://docs.microsoft.com/en-us/previous-versions/office/project-javascript-api/jj712612(v=office.15)
  - type: Authentication
    url: https://docs.microsoft.com/en-us/sharepoint/dev/sp-add-ins/authorization-and-authentication-of-sharepoint-add-ins
- name: Microsoft Graph Project API
  description: Microsoft Graph API for Project for the web, enabling access to projects, tasks, and bucket management.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developer.microsoft.com/en-us/graph
  baseURL: https://graph.microsoft.com/v1.0/
  tags:
  - Microsoft Graph
  - Project for the Web
  - Tasks
  properties:
  - type: Documentation
    url: https://docs.microsoft.com/en-us/graph/api/resources/project-rome-overview
  - type: Authentication
    url: https://docs.microsoft.com/en-us/graph/auth/
- name: Microsoft Project Server CSOM API
  description: Client-Side Object Model (CSOM) API for Project Server, providing programmatic access to Project Server data.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.microsoft.com/en-us/project/
  tags:
  - CSOM
  - .NET
  - On-Premises
  - Project Server
  properties:
  - type: Documentation
    url: https://docs.microsoft.com/en-us/previous-versions/office/project-server-2010/ee767622(v=office.14)
  - type: Code Samples
    url: https://docs.microsoft.com/en-us/project/api/project-api-code-samples
  - type: SDKs
    url: https://www.nuget.org/packages/Microsoft.SharePointOnline.CSOM/
common:
- type: VulnerabilityDisclosure
  url: security/ms-projects-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/ms-projects-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/microsoft
- type: Portal
  url: https://developer.microsoft.com/
- type: Blog
  url: https://techcommunity.microsoft.com/t5/project-blog/bg-p/ProjectBlog
- type: StatusPage
  url: https://status.microsoft.com/
- type: PrivacyPolicy
  url: https://privacy.microsoft.com/en-us/privacystatement
- type: TermsOfService
  url: https://www.microsoft.com/en-us/servicesagreement
- type: Integrations
  url: https://www.microsoft.com/en-us/marketplace
integrations:
- name: Microsoft
- name: Two people looking at a computer.
- name: This is placeholder text for
- name: IDC
- name: Nationwide
- name: RSA company
- name: Teleperformance
- name: A woman smiling at a laptop
- name: A man holding a laptop.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com