This connects Claude to Excel workbooks through a Rust-based toolkit that treats spreadsheets like structured data stores instead of files to screenshot. It exposes read operations for cells, ranges, tables, and named regions, plus mutation tools like batch writes, formula replacement, and row cloning with dry-run previews. The verification surface includes recalc, diff, and proof workflows so agents can validate changes before committing. Built around the asp CLI and spreadsheet-mcp server, it handles .xlsx and .xlsm with full write support, plus read-only modes for .xls and .xlsb. Reach for this when you need Claude to analyze financial models, append rows to structured tables, or edit workbooks without breaking formulas.
claude mcp add --transport stdio psu3d0-spreadsheet-mcp uvx spreadsheet-mcp