Compare Cli MCP

Name: Compare Cli MCP
Author: DrBaher

by DrBaherversion 0.1.4i★ –iRuns on your computer

Registry nameio.github.DrBaher/compare-cli-mcp

Install

Overview

Description from the maker (original English)

MCP server for compare-cli: contract version diff/redline and a drift gate as agent tools.

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: Other

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).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx 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": {
    "compare-cli": {
      "command": "npx",
      "args": [
        "-y",
        "compare-cli-mcp"
      ]
    }
  }
}

Run this in your terminal

claude mcp add compare-cli -- npx -y compare-cli-mcp

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "compare-cli": {
      "command": "npx",
      "args": [
        "-y",
        "compare-cli-mcp"
      ]
    }
  }
}

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": {
    "compare-cli": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "compare-cli-mcp"
      ]
    }
  }
}

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.

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 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account DrBaher, 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 Otheri

More stars than 0% of the other 32476 servers in this category
Published to the registry more recently than 12% of the other 32476 servers in this category
Basic checks equal to or better than 100% of the other 32476 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 Compare Cli MCP 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?

The registry does not list a required key, though some servers ask you to sign in on first use.

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 (0.1.4) reached the registry 5 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, zanadir

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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.

compare-cli-mcp

MCP (Model Context Protocol) server wrapping compare-cli for agent pipelines. Three tools, stdio transport, JSON-first responses with optional human report.

Design contract: ../docs/mcp.md. This package ships the implementation; behavior and schemas track the design version.

Part of the contract-ops suite.

Install

compare-cli-mcp has compare-cli as a peer dependency, so install both:

npm install -g compare-cli@^0.3.0 compare-cli-mcp@^0.1.1

Then run:

compare-mcp           # spawns the MCP server on stdio

Wire into an MCP client

Claude Desktop / Claude Code

Add to your MCP-client config (e.g. ~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

"mcpServers": { "compare-cli": { "command": "compare-mcp" } } }

With base-directory lockdown (recommended for unattended use)

"mcpServers": { "compare-cli": { "command": "compare-mcp", "env": { "COMPARE_MCP_BASE_DIR": "/path/to/contract/documents" } } } }

Every path argument the agent supplies is then resolved against COMPARE_MCP_BASE_DIR and rejected if it escapes the directory (symlinks collapsed). Without the env var the server reads any file the process can read — see the security note in ../docs/mcp.md §3.2.

Tools

Tool	Purpose
`compare_files`	Two-document comparison. Each side accepts `path`, `content_base64`, or `content_text`.
`compare_with_negotiation`	Base is read from nda-review-cli's `negotiation.json`. Returns `base.negotiation_resolution` so the agent can audit which signal produced the agreed text.
`compare_demo`	Zero-arg synthetic comparison against bundled fixtures. Deterministically returns `exit_class: "substantive"`. Use to confirm the server is wired up.

Tool descriptions, input schemas, and output schemas are advertised on tools/list. The schemas are stable across v1.x of this package; any change is fenced by the snapshot golden in tests/fixtures/tools-list.json.

Output shape

Every successful tool call returns:

`structuredContent` — the exact compare --json shape (top-level ok, exit_class, exit_code, base, candidate, summary, differences, warnings). Stable across compare-cli v1.x per its AGENTS.md. This is the contract the agent reads.
`content[0]` — the same JSON serialized as a text block, for MCP clients that don't yet read structuredContent.
`content[1]` (optional, when caller passes include_human_report: true) — the human-readable report.

compare_with_negotiation adds structuredContent.base.negotiation_resolution ∈ {"status", "per_round_agreed", "clause_status"} indicating which of the three resolution tiers produced the agreed base text.

Errors vs drift

Substantive drift is a successful tool call. The agent asked what's different and the server answered. Routing on exit_class is the contract — error envelopes (isError: true) are reserved for I/O / argument failures plus one explicit precondition exception:

Code	Trigger
`INPUT_NOT_FOUND`	Path not found / unreadable.
`INPUT_MALFORMED`	Malformed `.docx` / `.pdf`.
`PDF_NO_TEXT_LAYER`	Scanned PDF; pdfjs extracted zero characters.
`INVALID_ARGS`	Schema-validation failure (missing args, `oneOf` violation, etc.).
`PATH_OUTSIDE_BASE_DIR`	`COMPARE_MCP_BASE_DIR` is set and the path escapes it.
`NO_AGREED_ROUND`	`compare_with_negotiation` precondition: no agreed round found. The CLI returns exit 2 here; the MCP server promotes it to an error because no comparison ran.
`NOT_SIGNED_OFF`	`require_signoffs: true` and `signoffs.a` / `signoffs.b` is missing.
`INTERNAL_ERROR`	Unexpected; surfaces underlying message so the agent isn't blind.

Codes are stable across v1.x of this package.

Running the test suite

# From the repo root:

npm install # workspaces resolve compare-cli + compare-cli-mcp cd mcp && npm test # 22 tests, ~100 ms

The conformance + snapshot suite is in tests/test_protocol.mjs. The tools/list golden lives at tests/fixtures/tools-list.json. To regenerate the golden after an intentional schema change (also bump the minor version):

node -e 'import("./compare-cli-mcp.mjs").then(m => process.stdout.write(JSON.stringify(JSON.parse(JSON.stringify(m.TOOLS)), null, 2)))' > tests/fixtures/tools-list.json

License

MIT. See ../LICENSE.

Compare Cli MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

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 Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

zanadir

README from the maker

compare-cli-mcp

Install

Wire into an MCP client

Claude Desktop / Claude Code

With base-directory lockdown (recommended for unattended use)

Tools

Output shape

Errors vs drift

Running the test suite

License