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heilgar

Shadcn UI MCP Server

by heilgar

Shadcn UI MCP Server

A powerful and flexible MCP (Model Control Protocol) server designed to enhance the development experience with Shadcn UI components. This server provides a robust foundation for building and managing UI components with advanced tooling and functionality.

Features

Tools

The MCP server provides a set of tools that can be used through the Model Control Protocol:

  • list-components: Get the list of available shadcn/ui components

  • get-component-docs: Get documentation for a specific component

  • install-component: Install a shadcn/ui component

  • list-blocks: Get the list of available shadcn/ui blocks

  • get-block-docs: Get documentation for a specific block

  • install-blocks: Install a shadcn/ui block

Functionality

  • Component Management

    • List available shadcn/ui components

    • Get detailed documentation for specific components

    • Install components with support for multiple package managers (npm, pnpm, yarn, bun)

  • Block Management

    • List available shadcn/ui blocks

    • Get documentation and code for specific blocks

    • Install blocks with support for multiple package managers

  • Package Manager Support

    • Flexible runtime support for npm, pnpm, yarn, and bun

    • Automatic detection of user's preferred package manager

Related MCP server: aceternityui-mcp

Installation

Prerequisites

  • Node.js (v18 or higher)

  • npm or yarn package manager

Claude Desktop Configuration

To use with Claude Desktop, add the server config:

On MacOS: ~/Library/Application Support/Claude/claude_desktop_config.json On Windows: %APPDATA%/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "shadcn-ui-server": {
      "command": "npx",
      "args": ["@heilgar/shadcn-ui-mcp-server"]
    }
  }
}

Windsurf Configuration

Add this to your ./codeium/windsurf/model_config.json:

{
  "mcpServers": {
    "shadcn-ui-server": {
      "command": "npx",
      "args": ["@heilgar/shadcn-ui-mcp-server"]
    }
  }
}

Cursor Configuration

Add this to your .cursor/mcp.json:

{
  "mcpServers": {
    "shadcn-ui-server": {
      "command": "npx",
      "args": ["@heilgar/shadcn-ui-mcp-server"]
    }
  }
}

Development and Debugging

Local Development

  1. Install dependencies:

npm install
  1. Build the server:

npm run build

Debugging

Since MCP servers communicate over stdio, debugging can be challenging. We recommend using the MCP Inspector for debugging:

npm run inspector

The Inspector will provide a URL to access debugging tools in your browser, allowing you to:

  • Monitor MCP communication

  • Inspect tool calls and responses

  • Debug server behavior

  • View real-time logs

This project is built using the following tools and libraries:

License

MIT License - feel free to use this project for your own purposes.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Available Tools

6 tools
get-block-docsD
ParametersJSON Schema
NameRequiredDescriptionDefault
blockYesName of the block to get documentation for

TDQS

D1/5.0
Behavior1/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Tool has no description.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness1/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Tool has no description.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness1/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Tool has no description.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Tool has no description.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose1/5

Does the description clearly state what the tool does and how it differs from similar tools?

Tool has no description.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines1/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Tool has no description.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

get-component-docsD
ParametersJSON Schema
NameRequiredDescriptionDefault
componentYesName of the component to get documentation for

TDQS

D1/5.0
Behavior1/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Tool has no description.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness1/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Tool has no description.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness1/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Tool has no description.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Tool has no description.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose1/5

Does the description clearly state what the tool does and how it differs from similar tools?

Tool has no description.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines1/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Tool has no description.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

install-blocksD
ParametersJSON Schema
NameRequiredDescriptionDefault
blockYesName of the block to install
runtimeNoUser runtime (npm, pnpm, yarn, bun)

TDQS

D1/5.0
Behavior1/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Tool has no description.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness1/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Tool has no description.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness1/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Tool has no description.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Tool has no description.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose1/5

Does the description clearly state what the tool does and how it differs from similar tools?

Tool has no description.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines1/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Tool has no description.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

install-componentD
ParametersJSON Schema
NameRequiredDescriptionDefault
componentYesName of the component to install
runtimeNoUser runtime (npm, pnpm, yarn, bun)

TDQS

D1/5.0
Behavior1/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Tool has no description.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness1/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Tool has no description.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness1/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Tool has no description.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Tool has no description.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose1/5

Does the description clearly state what the tool does and how it differs from similar tools?

Tool has no description.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines1/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Tool has no description.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

list-blocksD
ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

TDQS

D1/5.0
Behavior1/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Tool has no description.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness1/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Tool has no description.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness1/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Tool has no description.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Tool has no description.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose1/5

Does the description clearly state what the tool does and how it differs from similar tools?

Tool has no description.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines1/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Tool has no description.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

list-componentsD
ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

TDQS

D1/5.0
Behavior1/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Tool has no description.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness1/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Tool has no description.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness1/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Tool has no description.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Tool has no description.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose1/5

Does the description clearly state what the tool does and how it differs from similar tools?

Tool has no description.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines1/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Tool has no description.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. 6 tool updatesv1.0.0
    • First observedget-block-docs
    • First observedget-component-docs
    • First observedinstall-blocks
    • First observedinstall-component
    • First observedlist-blocks
    • First observedlist-components

TDQS

C2.1/5.0
Disambiguation5/5

Each tool has a clearly distinct purpose with no overlap: get-block-docs and get-component-docs retrieve documentation, install-blocks and install-component handle installation, and list-blocks and list-components provide listings. The block/component distinction and action types (get, install, list) create unambiguous boundaries.

Naming Consistency5/5

All tools follow a perfect verb-noun pattern with consistent kebab-case formatting: get-block-docs, get-component-docs, install-blocks, install-component, list-blocks, list-components. The naming is completely predictable and follows the same structural convention throughout.

Tool Count4/5

Six tools is reasonable for a Shadcn UI server, covering documentation retrieval, installation, and listing for both blocks and components. While slightly minimal, it provides core functionality without being overwhelming. A few additional tools like update or search might enhance it but aren't essential.

Completeness4/5

The toolset covers the main workflows for Shadcn UI: discovering components/blocks (list), accessing documentation (get), and installation (install). Minor gaps exist, such as no update/uninstall tools or search functionality, but the core CRUD-like operations for this domain are well-represented.

Maintenance

ActivityInactive
ResponsivenessNo issues

Resources

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