What is the key difference between Shadcn Ui MCP Server and OnlyHarness Registry?

Shadcn Ui MCP Server belongs to the Developer Tools category with local stdio execution, while OnlyHarness Registry belongs to the Developer Tools category with local stdio execution.

How do I install Shadcn Ui MCP Server or OnlyHarness Registry in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Shadcn Ui MCP Server and OnlyHarness Registry free or paid?

Shadcn Ui MCP Server operates under a Free / Open Source model (API Key required). OnlyHarness Registry operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Shadcn Ui MCP Server lists 10 tools with 3 views and 2,999 GitHub stars. OnlyHarness Registry lists 0 tools with 1 views and 0 GitHub stars.

Can I use both Shadcn Ui MCP Server and OnlyHarness Registry together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Shadcn Ui MCP Server vs OnlyHarness Registry

In-depth architectural comparison of the Shadcn Ui MCP Server and OnlyHarness Registry MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Shadcn Ui MCP Server

Developer Tools · Local stdio

Quality: 68/100 (Great) | Auth: API Key required

OnlyHarness Registry

Developer Tools · Local stdio

Quality: 37/100 (Fair) | Auth: No auth required

Verdict Summary: Choose Shadcn Ui MCP Server if you need specialized Developer Tools tools running via a local process. Choose OnlyHarness Registry if your workspace requires Developer Tools integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Shadcn Ui MCP Server when:

You need dedicated capabilities in the Developer Tools domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: API Key required (Free / Open Source).
You have access to required keys: MCP_TRANSPORT_MODE, MCP_PORT, MCP_HOST, MCP_CORS_ORIGINS, GITHUB_PERSONAL_ACCESS_TOKEN, UI_LIBRARY.
Primary tools included: get_component, get_component_demo, list_components.

Explore Shadcn Ui MCP Server Details

Choose OnlyHarness Registry when:

You need dedicated capabilities in the Developer Tools domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).

Explore OnlyHarness Registry Details

Feature & Specification Comparison

Specification	Shadcn Ui MCP Server Jpisnice Developer Tools	OnlyHarness Registry Developer Tools
Summary	MCP server that gives AI assistants seamless access to shadcn/ui v4 components, blocks, demos, and metadata.	Search, inspect, pull and publish reusable AI-agent harnesses from onlyharness.com.
Category & Scope	Developer Tools

Tools & Capabilities Breakdown

Shadcn Ui MCP Server Tools (10)

get_component

Get the source code for a specific shadcn/ui v4 component

get_component_demo

Get demo code illustrating how a shadcn/ui v4 component should be used

list_components

Get all available shadcn/ui v4 components

get_component_metadata

Get metadata for a specific shadcn/ui v4 component

get_directory_structure

Get the directory structure of the shadcn-ui v4 repository

get_block

Get source code for a specific shadcn/ui v4 block (e.g., calendar-01, dashboard-01)

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Shadcn Ui MCP Server Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "jpisnice-shadcn-ui-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@jpisnice/shadcn-ui-mcp-server"
      ],
      "env": {
        "MCP_TRANSPORT_MODE": "YOUR_MCP_TRANSPORT_MODE_HERE",
        "MCP_PORT": "YOUR_MCP_PORT_HERE",
        "MCP_HOST": "YOUR_MCP_HOST_HERE",
        "MCP_CORS_ORIGINS": "YOUR_MCP_CORS_ORIGINS_HERE",
        "GITHUB_PERSONAL_ACCESS_TOKEN": "YOUR_GITHUB_PERSONAL_ACCESS_TOKEN_HERE",
        "UI_LIBRARY": "YOUR_UI_LIBRARY_HERE"
      }
    }
  }
}

OnlyHarness Registry Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "onlyharness-registry": {
      "command": "npx",
      "args": [
        "-y",
        "onlyharness@latest"
      ]
    }
  }
}

Frequently Asked Questions

Shadcn Ui MCP Server is categorized under Developer Tools and uses a local stdio subprocess. In contrast, OnlyHarness Registry belongs to Developer Tools using local stdio subprocess. Select Shadcn Ui MCP Server when you need capabilities focused on developer tools and OnlyHarness Registry when you require tools for developer tools.

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