Refactoring MCP Server

MCP server exposing Martin Fowler's refactoring catalog to LLMs with 71+ refactorings

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Not yet automatically verified

We haven't yet run this listing's install command through our automated sandbox check. This isn't a red flag — we're steadily working through the catalog.

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "refactoring-mcp-server": {
      "command": "uvx",
      "args": [
        "mcp-refactoring"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

mcp-refactoring

An MCP (Model Context Protocol) server that exposes Martin Fowler's refactoring catalog to LLMs through a pluggable, language-agnostic architecture.

Features

71+ Refactorings: Full implementation of Martin Fowler's refactoring catalog
Pluggable Architecture: Support for multiple languages (Python first, Ruby/Java/Go planned)
Safe by Default: Preview mode shows changes before applying
LLM-Optimized: TOON output format for token efficiency

Installation

bash

# Using uvx (recommended)
uvx mcp-refactoring

# Using pip
pip install mcp-refactoring

# Using pipx
pipx install mcp-refactoring

Requirements

Python 3.10+
A language backend (e.g., molting-cli for Python)

Install the Python backend:

Terminal

pip install molting-cli

Claude Desktop Configuration

Add to your Claude Desktop config:

config.json

{
  "mcpServers": {
    "refactoring": {
      "command": "uvx",
      "args": ["mcp-refactoring"]
    }
  }
}

Available Tools

list_refactorings

List available refactorings with their parameter contracts.

Code

list_refactorings(language="python", category="composing_methods")

preview_refactoring

Preview what changes a refactoring would make (dry-run).

Code

preview_refactoring(
    refactoring="extract-method",
    target="src/order.py::Order::calculate#L10-L15",
    params={"name": "calculate_tax"}
)

apply_refactoring

Apply a refactoring to the codebase.

Code

apply_refactoring(
    refactoring="rename-method",
    target="src/order.py::Order::calc",
    params={"new_name": "calculate_total"}
)

inspect_structure

Get structural information about code.

Code

inspect_structure(path="src/order.py", depth="method")

analyze_code

Analyze code for smells and suggest refactorings.

Code

analyze_code(path="src/order.py", smells=["long-method"])

Target Specification

Each language uses its native conventions:

Python

Code

src/order.py::Order::calculate_total        # Method
src/order.py::Order::calculate_total#L10-L15  # Line range
src/order.py::Order                         # Class

Configuration

Create ~/.mcp-refactoring/config.toml:

toml

[backends.python]
enabled = true
command = "molting"

[backends.ruby]
enabled = false
command = "molting-rb"

Environment variable overrides:

bash

MCP_REFACTORING_PYTHON_COMMAND=/path/to/molting
MCP_REFACTORING_PYTHON_ENABLED=true

Refactoring Categories

Based on Martin Fowler's catalog:

Composing Methods: extract-method, inline-method, etc.
Moving Features: move-method, extract-class, etc.
Organizing Data: encapsulate-field, replace-type-code, etc.
Simplifying Conditionals: decompose-conditional, guard-clauses, etc.
Simplifying Method Calls: rename-method, add-parameter, etc.
Dealing with Generalization: pull-up-method, extract-interface, etc.

Development

bash

# Clone the repository
git clone https://github.com/marshally/mcp-refactoring.git
cd mcp-refactoring

# Install in development mode
pip install -e ".[dev]"

# Run tests
pytest

# Run linter
ruff check .

# Run type checker
mypy src/

License

MIT License - see LICENSE for details.

Read the full README →View source on GitHub →

Related MCP Servers

View all in Developer Tools View all alternatives

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about Refactoring MCP Server

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "refactoring-mcp-server": { "command": "npx", "args": ["-y", "Refactoring MCP Server"] } }

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Technical Specs & Signals

CategoryDeveloper Tools

37Quality signal: Fair · 37/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools16/30

Adoption & activity2/15

Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

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More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to Refactoring MCP Server →Install in Claude Desktop Install in Cursor Install in VS Code

Refactoring MCP Server

MCP server exposing Martin Fowler's refactoring catalog to LLMs with 71+ refactorings

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Not yet automatically verified

We haven't yet run this listing's install command through our automated sandbox check. This isn't a red flag — we're steadily working through the catalog.

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "refactoring-mcp-server": {
      "command": "uvx",
      "args": [
        "mcp-refactoring"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

mcp-refactoring

An MCP (Model Context Protocol) server that exposes Martin Fowler's refactoring catalog to LLMs through a pluggable, language-agnostic architecture.

Features

71+ Refactorings: Full implementation of Martin Fowler's refactoring catalog
Pluggable Architecture: Support for multiple languages (Python first, Ruby/Java/Go planned)
Safe by Default: Preview mode shows changes before applying
LLM-Optimized: TOON output format for token efficiency

Installation

bash

# Using uvx (recommended)
uvx mcp-refactoring

# Using pip
pip install mcp-refactoring

# Using pipx
pipx install mcp-refactoring

Requirements

Python 3.10+
A language backend (e.g., molting-cli for Python)

Install the Python backend:

Terminal

pip install molting-cli

Claude Desktop Configuration

Add to your Claude Desktop config:

config.json

{
  "mcpServers": {
    "refactoring": {
      "command": "uvx",
      "args": ["mcp-refactoring"]
    }
  }
}

Available Tools

list_refactorings

List available refactorings with their parameter contracts.

Code

list_refactorings(language="python", category="composing_methods")

preview_refactoring

Preview what changes a refactoring would make (dry-run).

Code

preview_refactoring(
    refactoring="extract-method",
    target="src/order.py::Order::calculate#L10-L15",
    params={"name": "calculate_tax"}
)

apply_refactoring

Apply a refactoring to the codebase.

Code

apply_refactoring(
    refactoring="rename-method",
    target="src/order.py::Order::calc",
    params={"new_name": "calculate_total"}
)

inspect_structure

Get structural information about code.

Code

inspect_structure(path="src/order.py", depth="method")

analyze_code

Analyze code for smells and suggest refactorings.

Code

analyze_code(path="src/order.py", smells=["long-method"])

Target Specification

Each language uses its native conventions:

Python

Code

src/order.py::Order::calculate_total        # Method
src/order.py::Order::calculate_total#L10-L15  # Line range
src/order.py::Order                         # Class

Configuration

Create ~/.mcp-refactoring/config.toml:

toml

[backends.python]
enabled = true
command = "molting"

[backends.ruby]
enabled = false
command = "molting-rb"

Environment variable overrides:

bash

MCP_REFACTORING_PYTHON_COMMAND=/path/to/molting
MCP_REFACTORING_PYTHON_ENABLED=true

Refactoring Categories

Based on Martin Fowler's catalog:

Composing Methods: extract-method, inline-method, etc.
Moving Features: move-method, extract-class, etc.
Organizing Data: encapsulate-field, replace-type-code, etc.
Simplifying Conditionals: decompose-conditional, guard-clauses, etc.
Simplifying Method Calls: rename-method, add-parameter, etc.
Dealing with Generalization: pull-up-method, extract-interface, etc.

Development

bash

# Clone the repository
git clone https://github.com/marshally/mcp-refactoring.git
cd mcp-refactoring

# Install in development mode
pip install -e ".[dev]"

# Run tests
pytest

# Run linter
ruff check .

# Run type checker
mypy src/

License

MIT License - see LICENSE for details.

Read the full README →View source on GitHub →

Related MCP Servers

View all in Developer Tools View all alternatives

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about Refactoring MCP Server

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "refactoring-mcp-server": { "command": "npx", "args": ["-y", "Refactoring MCP Server"] } }

AllMCPs Directory Badge

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Showcase your server listing on GitHub or your project documentation. Embed this dynamic SVG badge to highlight official listing status and live engagement.

Badge Style:

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Markdown (GitHub README)

[![AllMCPs](https://allmcps.com/api/badge/refactoring-mcp-server?style=directory)](https://allmcps.com/mcp/refactoring-mcp-server)

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<a href="https://allmcps.com/mcp/refactoring-mcp-server"><img src="https://allmcps.com/api/badge/refactoring-mcp-server?style=directory" alt="Refactoring MCP Server on AllMCPs" /></a>

Technical Specs & Signals

CategoryDeveloper Tools

37Quality signal: Fair · 37/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools16/30

Adoption & activity2/15

Community engagement0/10

★ Featured

AllMCPs Server

Explore Server →

Own this project?

Free dofollow backlink: add your website and place the AllMCPs badge on it — no claim needed. We detect it automatically and keep it verified as long as the badge stays live.

Claim & get free dofollow

Share & Embed

Add our SVG badge (dark/light directory styles) or embeddable widget to your site.

Explore more

More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to Refactoring MCP Server →Install in Claude Desktop Install in Cursor Install in VS Code