Microsoft Graph Functions

Microsoft Graph Functions is the Excel capability in Microsoft Graph that lets developers invoke hundreds of Excel worksheet functions through REST, running calculations directly on workbooks stored in OneDrive or SharePoint without opening the Excel app. Your app calls the workbook/functions endpoints with parameters (for example SUM, XLOOKUP, FILTER, DATE, financial and statistical functions), and the service returns typed results that can be written back to cells or used to drive business logic. Because the calculations execute server-side within a workbook session, you can automate analytics, validations, and transformations at scale, combine them with tables, ranges, and charts APIs, and orchestrate end-to-end Excel workflows via Graph.