slim-sheet

Name: slim-sheet
Author: j4flmao

by j4flmaoversion 0.1.0i★ –iRuns on your computer

Registry nameio.github.j4flmao/slim-sheet

Install

Overview

Description from the maker (original English)

Spreadsheet MCP for any agent: reads xlsx/xls/ods/csv, SQL, cleaning, formulas, safe edits

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Docs, sheets & office work
You need to fill in: SLIM_SHEET_PASSWORD

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: SLIM_SHEET_TIER, SLIM_SHEET_ROOTS, SLIM_SHEET_MAX_TOKENS, SLIM_SHEET_PASSWORD

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

PyPIPython’s uv installed (for the uvx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "slim-sheet": {
      "command": "uvx",
      "args": [
        "slim-sheet",
        "mcp"
      ],
      "env": {
        "SLIM_SHEET_TIER": "your-value",
        "SLIM_SHEET_ROOTS": "your-value",
        "SLIM_SHEET_MAX_TOKENS": "your-value",
        "SLIM_SHEET_PASSWORD": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add slim-sheet --env SLIM_SHEET_TIER=your-value --env SLIM_SHEET_ROOTS=your-value --env SLIM_SHEET_MAX_TOKENS=your-value --env SLIM_SHEET_PASSWORD=your-value -- uvx slim-sheet mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "slim-sheet": {
      "command": "uvx",
      "args": [
        "slim-sheet",
        "mcp"
      ],
      "env": {
        "SLIM_SHEET_TIER": "your-value",
        "SLIM_SHEET_ROOTS": "your-value",
        "SLIM_SHEET_MAX_TOKENS": "your-value",
        "SLIM_SHEET_PASSWORD": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "slim-sheet": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "slim-sheet",
        "mcp"
      ],
      "env": {
        "SLIM_SHEET_TIER": "your-value",
        "SLIM_SHEET_ROOTS": "your-value",
        "SLIM_SHEET_MAX_TOKENS": "your-value",
        "SLIM_SHEET_PASSWORD": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

SLIM_SHEET_TIER env
Tool tier: full (28 tools, default), standard (16) or lite (7, for small local models)
SLIM_SHEET_ROOTS env
Folders the server may read and write, separated by the OS path separator
SLIM_SHEET_MAX_TOKENS env
Default response budget in tokens
SLIM_SHEET_PASSWORD secret env
Password for encrypted workbooks (needs the crypto extra)

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account j4flmao, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Docs, sheets & office worki

More stars than 0% of the other 2194 servers in this category
Published to the registry more recently than 78% of the other 2194 servers in this category
Basic checks equal to or better than 100% of the other 2194 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is slim-sheet safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: SLIM_SHEET_PASSWORD

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.0) reached the registry 8 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.

What can I use instead?

In the same category: Agent-Native Calendar, Excel MCP Server, MCP Server for Excel

Alternatives

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Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

slim-sheet

A spreadsheet MCP server that small local models can actually use. It reads xlsx xlsm xltx xltm xlsb xls ods numbers csv tsv parquet json locally (no Office, no network), keeps every response under a token budget, and gives agents SQL, cleaning, anomaly detection, a formula copilot, Excel-correct editing and one-call branded dashboards — through 8, 18 or 30 tools depending on how capable the model is.

Works with Claude Desktop / Claude Code (Free or Pro), OpenCode, Codex, Cursor, Cline, Continue, LM Studio, Ollama (via mcpo or Open WebUI) — and as a plain CLI for agents without MCP.

Install

uvx slim-sheet mcp                          # MCP server over stdio

uvx slim-sheet overview sales.xlsx # or use any tool from the shell uvx --from "slim-sheet[all]" slim-sheet mcp # + offline formula engine, encrypted files, Apple Numbers

Host configuration for every client (Claude, Cursor, OpenCode, Codex, LM Studio, Ollama/mcpo, Open WebUI, Cline, Continue) is in docs/hosts.md.

"mcpServers": { "slim-sheet": { "command": "uvx", "args": ["slim-sheet", "mcp"], "env": { "SLIM_SHEET_TIER": "lite", "SLIM_SHEET_ROOTS": "/path/to/your/data" } } } }

Tiers

Tier	Tools	For
`full` (default)	every tool below	any model that should be able to do everything
`lite`	`overview`, `read`, `find`, `query`, `profile`, `write`, `explain_formula`, `build_report`	3B–8B local models
`standard`	lite + `clean`, `anomalies` (+formula audit), `merge`, `convert` (+split), `diff`, `undo`, `evaluate` (+check), `describe_cell` (+trace), `style_sheet`, `what_if`	mid-size and frontier models
`full`	standard + `create_workbook`, `sheet_ops`, `range_ops`, `name_ops`, `format_range`, `set_table`, `rules`, `add_chart`, `sheet_layout`, `annotate`, `pivot`, `split`, `recalc`	frontier models building workbooks

Pick exact tools with SLIM_SHEET_TOOLS=overview,read,query.

Design: professional output with almost no description

The model names *what* to show; slim-sheet decides *how* it looks — layout, colours, fonts, number formats, chart type, sort order and an insight title — from a brand. One call:

build_report(path="sales.xlsx", data_sheet="Sales", title="Sales performance 2025",

kpis=["Revenue=sum:Revenue", "Margin=ratio:Profit/Revenue", "Orders=count"], charts=["trend:Month:Revenue", "rank:Region:Revenue", "share:Product:Revenue"])

gives a one-page dashboard: KPI tiles with live formulas (7.1m · 20.4% · 144), a line titled "Revenue rose 58% from 2025-01 to 2025-12", a sorted bar with the leader highlighted, a labelled doughnut, a source footer. style_sheet(path, sheet, preset="report") does the same for any table and reports the number formats it inferred.

Your company's look, set once. Built-in brands: slim (default), office, modern (Aptos), mono (IBCS-style), gov (UK government statistics style). Or point SLIM_SHEET_BRAND at a JSON file — only name is required:

{ "name": "Acme", "primary": "#C8102E", "body_font": "Arial", "currency": "$", "profile": "finance" }

Every workbook then carries the brand as a real Office theme, so Excel's own table and chart styles follow it too. Rules behind the defaults (IBCS, finance colour coding, UK spreadsheet accessibility guidance, chart-choice tables): PLAN.md §16.

What makes it different

Reads everything with one interface, including .xls, .xlsb, .ods, Apple Numbers and password-protected xlsx.
Budgeted output: Markdown tables with A1 coordinates, ~1,500 tokens per response, next cursors to continue.
Errors that teach: every error has a code, a message and a corrected example call.
SQL over sheets with DuckDB; messy sheets are split into regions with detected headers ("Report.2").
Never destroys data: edits go to .slim.xlsx unless overwrite=true, writes are atomic, every replaced file is journaled, and undo steps back.
Excel-correct structure edits: inserting/deleting rows or renaming a sheet rewrites formulas, names, merges, validations, conditional formats, tables and charts the way Excel does.
Model checking: anomalies scope='formulas' finds hardcoded numbers, broken patterns, double counting and where an error starts; describe_cell trace= follows formulas across sheets; what_if runs delta, goal seek and sensitivity grids without touching the file.
Formula copilot: 514-function catalog, version checks (XLOOKUP in Excel 2016 → suggests INDEX/MATCH), offline evaluation with dependency chasing.
Macros, read-only: read sheet='#vba' shows VBA source, anomalies scope='macros' rates risk, and agents redo a macro's job with tools (prompt replace_macro). slim-sheet never runs macros.
Excel-exact formulas: newer functions are stored with Excel's _xlfn. prefixes and spilling formulas as real dynamic arrays, with a warning when something blocks the spill.
Flexible paths, safe by default: give any folder in chat (no config change); system folders, AppData, dot-folders such as .ssh and non-spreadsheet files are refused. Read-only SQL with file access locked, no model-written code is executed, no network.

Configuration

Variable	Default	Meaning
`SLIM_SHEET_TIER`	`full`	`full`, `standard` or `lite`
`SLIM_SHEET_TOOLS`	—	explicit comma-separated tool list
`SLIM_SHEET_ROOTS`	current directory	default folders for relative paths and `overview()` (`;` on Windows, `:` elsewhere)
`SLIM_SHEET_STRICT_ROOTS`	off	`1` = only paths inside `SLIM_SHEET_ROOTS` (the old allow-list)
`SLIM_SHEET_MAX_TOKENS`	`1500`	default response budget
`SLIM_SHEET_TOKEN`	—	bearer token for `--transport streamable-http` (required off loopback)
`SLIM_SHEET_PASSWORD`	—	password for encrypted workbooks (never passed through chat)
`SLIM_SHEET_SOFFICE`	autodetect	LibreOffice binary for `recalc`
`SLIM_SHEET_AUDIT_LOG`	—	JSONL audit log of every tool call (contents redacted)
`SLIM_SHEET_RATE_LIMIT`	`120`	HTTP tool calls per minute per client (`0` = off)
`SLIM_SHEET_MAX_CELLS`	`3000000`	refuse workbooks declaring more cells (`0` = off)
`SLIM_SHEET_BRAND`	`slim`	brand name (`slim`, `office`, `modern`, `mono`, `gov`) or path to a brand `.json`

Extras: formula (offline evaluate and what_if), crypto (encrypted xlsx), numbers (Apple Numbers), images (insert pictures with annotate), all.

Prompt library

Ready-made, data-agnostic prompts — a shared CORE method, thirteen ROLES (nine analyst roles: sales, finance, marketing, customer, operations, HR, reconciliation, data quality, general; plus model auditor, workbook editor, macro migrator and file reviewer) and eight OUTPUT patterns (dashboard, dashboard pack, report workbook, clean dataset, reconciliation report, quick answer, audit report, edited workbook), with filled-in example sets, about 50 one-paste task recipes in 8 packs (finance, sales, HR, operations, data prep, Excel tasks, reporting, Vietnam) and compact blocks for small local models: docs/prompts.

Skill packs

skills/building-client-reports turns the tools into client-ready reports: a report brief, role presets (CFO, board, sales, marketing, operations, HR, market research), a standards checklist and evals. Copy it into ~/.claude/skills/ or attach it to any agent (skills/README.md).

Non-MCP hosts

slim-sheet schema --format openai --tier lite      # function-calling schemas for any OpenAI-compatible API

slim-sheet schema --format anthropic --tier full # Messages API tool definitions SLIM_SHEET_TOKEN=... slim-sheet mcp --transport streamable-http --host 0.0.0.0 --port 8765

Development

uv sync --all-extras

uv run pre-commit install # ruff, mypy, manifests, commit-message rule, tests on push uv run python scripts/make_demo.py # sample workbooks in ~/Documents/slim-sheet-demo uv run ruff check . && uv run ruff format --check . && uv run mypy src && uv run pytest -q

Issues and pull requests use the templates in .github/; security reports go through SECURITY.md.

Design and roadmap: PLAN.md · agent rules: AGENTS.md · MIT licensed.

slim-sheet

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Docs, sheets & office worki

Common questions

Alternatives

Agent-Native Calendar

Excel MCP Server

MCP Server for Excel

README from the maker

slim-sheet

Install

Tiers

Design: professional output with almost no description

What makes it different

Configuration

Prompt library

Skill packs

Non-MCP hosts

Development