Microsoft OneDrive API (Microsoft Graph Files)
Provides access to files and folders stored in Microsoft OneDrive and SharePoint through the Microsoft Graph API, enabling upload, download, search, sharing, and metadata operations.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Azure AD OAuth 2.0 with very fine-grained scopes and support for conditional access policies. Application permissions require explicit tenant admin consent. Comprehensive compliance portfolio.
⚡ Reliability
Best When
You are building agents that integrate with Microsoft 365 environments where files are stored in OneDrive or SharePoint.
Avoid When
You need a cloud storage API without Microsoft 365 organizational dependencies or OAuth complexity.
Use Cases
- • Upload processed documents or reports to a user's OneDrive or SharePoint library
- • Search and retrieve files by name, type, or metadata across OneDrive for automated document processing
- • Monitor a shared drive folder for new files using delta queries and trigger downstream workflows
- • Manage file permissions and sharing links programmatically for access control automation
- • Sync local file system changes to OneDrive as part of a backup or archival agent
Not For
- • Accessing Microsoft 365 email or calendar data (use Microsoft Graph Mail/Calendar APIs instead)
- • Real-time collaborative editing of Office documents (use Microsoft 365 collaborative APIs)
- • Storing structured application data at scale (not a database replacement)
Interface
Authentication
Microsoft Identity Platform (Azure AD / Entra ID) OAuth 2.0 with fine-grained scopes (Files.Read, Files.ReadWrite, Files.ReadWrite.All, Sites.Read.All, etc.). Supports delegated (user) and application (service) permission flows.
Pricing
API calls are free within Microsoft Graph service limits; storage costs are tied to Microsoft 365 subscription tier.
Agent Metadata
Known Gotchas
- ⚠ Azure AD app registration required before any API access — multi-step OAuth setup with tenant admin consent for application permissions
- ⚠ Throttling responses (429) include Retry-After headers but the throttling model is complex with multiple quota buckets (per-app, per-tenant, per-resource)
- ⚠ Delta query tokens for change tracking expire after a period; agents must handle token expiry and re-sync from scratch
- ⚠ SharePoint Sites vs OneDrive drive IDs require different resolution paths — agents must handle both drive types
- ⚠ Large file uploads require creating an upload session first and uploading in chunks; single-call uploads limited to 4 MB
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Microsoft OneDrive API (Microsoft Graph Files).
Scores are editorial opinions as of 2026-03-06.