A locally run tool for working with spreadsheet files using plain-language, meaning-aware operations. It is provided as a Python package.

Use it for spreadsheet file operations from a local environment.

It gives an AI assistant a way to work with spreadsheet content based on its meaning rather than only cell positions.

sheets — MCP server by os-tack

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add mcp/os-tack/fcp/sheets

Clone the repo

git clone --depth 1 https://github.com/os-tack/fcp

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin 100% copy Near-identical to another mod in the catalogue.

Security

Grade A, and why

sheets scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to sheets — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.mcp.json · 12 lines

What it actually says

{
  "sheets": {
    "command": "uvx",
    "args": [
      "--refresh-package",
      "fcp-sheets",
      "--python",
      "3.13",
      "fcp-sheets"
    ]
  }
}

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

yesterday First seen · 12 lines scan A 24b82a5892e2

Subscribe to this mod's changes

sheets is an MCP server published in the GitHub repository os-tack/fcp (2 stars, last pushed 1mo ago), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. It is 100% identical to sheets, differing in 0 lines, and is treated as a copy.

Data and AI Documents LLM Languages ai-tools dsl file-formats mcp model-context-protocol

sheets

Getting it into your agent

Grade A, and why

Nothing flagged

This is a copy

What it actually says

What this file has done since we first saw it

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