Microsoft Excel

**Overall judgment:** A robust and well-documented Excel integration for OneDrive/SharePoint via Microsoft Graph, well-suited for most programmatic Excel data manipulation and reporting workflows. It is strongest when used as a backend for reading/writing structured spreadsheet data and automating routine Excel operations. **Key strengths** - Comprehensive coverage of core Excel Graph features: worksheets, ranges, tables, charts, named items, file upload. - Managed OAuth model (MATON API gateway + connection management) simplifies authentication compared to raw Microsoft Graph. - Session support for batching multiple operations, improving performance for complex or repeated tasks. - Clear API patterns and examples in Python and JavaScript, plus explicit error codes and troubleshooting steps. **Risks / limitations** - Restricted to .xlsx files only (no legacy .xls), and OneDrive/SharePoint-backed workbooks. - Requires external MATON_API_KEY management and separate connection setup at maton.ai/ctrl, which adds operational overhead. - Full read/write access means misuse or bugs can corrupt or delete critical spreadsheet data; careful testing and least-privilege patterns are important. - Subject to Microsoft Graph and Maton gateway availability, rate limits, and session expiry, which can affect reliability in high-volume or long-running workflows. **Recommended scenarios** - Automating updates to existing Excel-based reports or dashboards stored in OneDrive/SharePoint. - Building data pipelines that treat Excel tables as source or destination for structured data (e.g., CRM exports, simple ETL steps). - AI or scripting workflows that need to read ranges, compute or transform data, and write results back into the same workbook. - Enterprise environments already standardized on Microsoft 365 where direct integration with Excel files is preferred over exporting to CSV or databases.