MCP server + CLI giving AI agents 50 spreadsheet tools for .xlsx — live-recalc formulas (~390 Excel functions), repair broken references & external links, read/write, diff, and audit. Works in Claude Code, Cursor, Codex, and any MCP client.
Give your agent an Office engine — an AI-native CLI + MCP server that creates, edits, renders & validates real .docx / .xlsx / .pptx. One self-contained C#/.NET binary, no Microsoft Office.
ClosedXML is a .NET library for reading, manipulating and writing Excel 2007+ (.xlsx, .xlsm) files. It aims to provide an intuitive and user-friendly interface to dealing with the underlying OpenXML API.
GridNexa is a developer-first Excel-like data grid for React, Vue, Angular, and JavaScript. It includes editing, filtering, undo/redo, fill handle, export, saved views, change review, validation, diagnostics, and one-click repro export for building powerful data-heavy apps faster.