Exposes 37 tools for working with Excel files through MCP. You get the obvious read/write/diff operations, plus structural introspection that pandas drops on the floor: named ranges, data validations, conditional formatting, pivot table definitions, slicers, embedded images, form controls, and VBA macro detection. The `xlsx_doctor` tool runs a one-shot health check for macros, external links, and hidden sheets. Compute layer includes filter, aggregate, sort, and pivot operations that run server-side. Installs globally via npm, registers via stdio transport, and auto-provisions an anonymous client UUID on first use. Free tier available. Useful when your agent needs to preserve Excel semantics instead of flattening everything to CSV.
claude mcp add --transport stdio senoff-xlsx-for-ai -- npx -y xlsx-for-ai