mcp-name: io.github.marekrost/mcp-server-spreadsheet
Data-first MCP server for reading and writing spreadsheet files (.xlsx, .csv, .ods).
- Multi-format — works with Excel (
.xlsx), CSV (.csv), and OpenDocument (.ods) files through a unified tool interface. - Dual mode — cell-level workbook operations and a DuckDB-powered SQL query engine, interleaved freely on the same file.
- Workbook essentials — worksheets, rows, columns, cells, search.
- Data-only — preserves existing formatting but only reads and writes values.
- Stateless — every call specifies
fileandsheetexplicitly; no handles or sessions. - Atomic saves — writes go to a temp file, then
os.replace()into the target path. - Type coercion on write — numeric strings become numbers, everything else is text.
- SQL across sheets — JOINs, GROUP BY, aggregates, subqueries via in-memory DuckDB; mutations write back to the file.
- CSV as single-sheet workbook — CSV files are treated as a workbook with one sheet named
default.
- Python 3.13+
No local checkout needed — just configure your MCP client (see below).
git clone https://github.com/marekrost/mcp-server-spreadsheet.git cd mcp-server-spreadsheet uv syncAdd to your claude_desktop_config.json:
Using PyPI (recommended):
{ "mcpServers": { "mcp-server-spreadsheet": { "command": "uvx", "args": ["mcp-server-spreadsheet"] } } }Using local source:
{ "mcpServers": { "mcp-server-spreadsheet": { "command": "uv", "args": ["run", "--directory", "/path/to/mcp-server-spreadsheet", "main.py"] } } }Add to your .mcp.json:
Using PyPI (recommended):
{ "mcpServers": { "mcp-server-spreadsheet": { "command": "uvx", "args": ["mcp-server-spreadsheet"] } } }Using local source:
{ "mcpServers": { "mcp-server-spreadsheet": { "command": "uv", "args": ["run", "--directory", "/path/to/mcp-server-spreadsheet", "main.py"] } } }# PyPI uvx mcp-server-spreadsheet # Local source uv run main.py| Format | Sheets | Formulas | Types |
|---|---|---|---|
.xlsx | Multiple | Preserved as strings | Native (int, float, date, bool) |
.ods | Multiple | Not preserved | Native (int, float, date, bool) |
.csv | Single (default) | N/A | Inferred on load (int, float, text) |
Sheet management tools (add_sheet, delete_sheet, copy_sheet) raise an error for CSV files.
| Tool | Description |
|---|---|
list_workbooks | List all spreadsheet files in a directory (non-recursive) |
create_workbook_file | Create a new empty spreadsheet file (format by extension) |
copy_workbook | Copy an existing file to a new path |
| Tool | Description |
|---|---|
list_sheets | List all sheet names in a workbook |
add_sheet | Add a new sheet (optional name and position) |
rename_sheet | Rename an existing sheet |
delete_sheet | Delete a sheet by name |
copy_sheet | Duplicate a sheet within a workbook (optional new name and position) |
| Tool | Description |
|---|---|
read_sheet | Read entire sheet as rows (optional row/column bounds) |
read_cell | Read a single cell value, e.g. B3 |
read_range | Read a rectangular range, e.g. A1:D10 |
get_sheet_dimensions | Get row and column count of the used range |
| Tool | Description |
|---|---|
write_cell | Write a value to a single cell |
write_range | Write a 2D array starting at a given cell |
append_rows | Append rows after the last used row |
insert_rows | Insert blank or pre-filled rows at a position (shifts rows down) |
delete_rows | Delete rows by index (shifts rows up) |
clear_range | Clear values in a range without removing rows/columns |
copy_range | Copy a block of cells to another location (optionally to a different sheet) |
| Tool | Description |
|---|---|
insert_columns | Insert blank columns at a position |
delete_columns | Delete columns by index |
| Tool | Description |
|---|---|
search_sheet | Search for a value or regex pattern, returns matching cell references |
| Tool | Description |
|---|---|
describe_table | Inspect column names, inferred types, row count, and sample values |
sql_query | Execute a read-only SQL SELECT (supports JOINs across sheets, GROUP BY, aggregates, subqueries) |
sql_execute | Execute INSERT INTO, UPDATE, or DELETE FROM — writes changes back to the file |
SQL examples:
-- Filter and sort SELECT name, revenue FROM Sales WHERE status = 'Active' ORDER BY revenue DESC LIMIT 20 -- Cross-sheet JOIN SELECT o.order_id, c.name FROM Orders o JOIN Customers c ON o.customer_id = c.id -- Aggregate SELECT department, COUNT(*) AS n, AVG(salary) AS avg FROM Employees GROUP BY department -- Mutate UPDATE Sales SET status = 'Closed' WHERE quarter = 'Q1' AND revenue < 1000 DELETE FROM Logs WHERE date < '2024-01-01'Sheet names with spaces must be quoted: SELECT * FROM "Q1 Sales".
Every sheet-level tool accepts:
| Parameter | Required | Description |
|---|---|---|
file | yes | Path to the spreadsheet file (.xlsx, .csv, or .ods) |
sheet | no | Sheet name. Defaults to the first sheet in the workbook |
All row/column indices are 1-based. Cell references use A1 notation (A1, $B$2).
