What is the key difference between Claude Task Master and OnlyHarness Registry?

Claude Task Master 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 Claude Task Master 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 Claude Task Master and OnlyHarness Registry free or paid?

Claude Task Master operates under a BYOK (Pay Provider Direct) 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?

Claude Task Master lists 5 tools with 8 views and 27,985 GitHub stars. OnlyHarness Registry lists 0 tools with 1 views and 0 GitHub stars.

Can I use both Claude Task Master 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.

How do I install Claude Task Master or OnlyHarness Registry in Claude Desktop, Cursor, or Windsurf?

Both servers follow the standard Model Context Protocol configuration format. Simply copy the JSON block from the configuration section above and paste it into your AI client's mcpServers configuration object (for instance in claude_desktop_config.json or ~/.cursor/mcp.json ), then completely restart or refresh the application.

Are Claude Task Master and OnlyHarness Registry free to use, or do they require API keys?

Claude Task Master is listed under a BYOK (Pay Provider Direct) model with API Key required . OnlyHarness Registry operates under a Free / Open Source model with No auth required . If environment variables are required (such as API keys), be sure to define them under the env key in your MCP client's configuration file.

Can I run both Claude Task Master and OnlyHarness Registry at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both eyaltoledano-claude-task-master and onlyharness-registry as distinct keys inside the single mcpServers object in your configuration file. Your AI assistant will automatically select and call the appropriate tool from either server during chat sessions.

Which MCP server has higher directory engagement and quality ratings?

On AllMCPs, Claude Task Master has a Quality Score of 61 /100 ( Good ) with 8 views, 0 installs, and 27,985 GitHub stars. OnlyHarness Registry holds a Quality Score of 27 /100 ( Emerging ) with 1 views, 0 installs, and 0 GitHub stars.

Side-by-Side Model Context Protocol Comparison

Claude Task Master vs OnlyHarness Registry

In-depth architectural comparison of the Claude Task Master 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

Claude Task Master

Developer Tools · Local stdio

Quality: 61/100 (Good) | Auth: API Key required

OnlyHarness Registry

Developer Tools · Local stdio

Quality: 27/100 (Emerging) | Auth: No auth required

Verdict Summary: Choose Claude Task Master 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 Claude Task Master when:

You need dedicated capabilities in the Developer Tools domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: API Key required (BYOK (Pay Provider Direct)).
You have access to required keys: ANTHROPIC_API_KEY, PERPLEXITY_API_KEY, OPENAI_API_KEY, GOOGLE_API_KEY, MISTRAL_API_KEY, GROQ_API_KEY, OPENROUTER_API_KEY, XAI_API_KEY.
Primary tools included: Multi-provider AI support (Claude, OpenAI, Gemini, Perplexity, xAI), PRD parsing to generate tasks, Task expansion and management.

Explore Claude Task Master 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).

Feature & Specification Comparison

Specification	Claude Task Master eyaltoledano Developer Tools	O OnlyHarness Registry Developer Tools
Summary	AI-powered task management system for AI-driven development. Features PRD parsing, task expansion, multi-provider support (Claude, OpenAI, Gemini, Perplexity, xAI), and selective tool loading for optimized context usage.	Search, inspect, pull and publish reusable AI-agent harnesses from onlyharness.com.
Category & Scope	Developer Tools

Tools & Capabilities Breakdown

Claude Task Master Tools (5)

Multi-provider AI support (Claude, OpenAI, Gemini, Perplexity, xAI)

PRD parsing to generate tasks

Task expansion and management

Selective tool loading for optimized context

Compatibility with AI chat clients like Cursor

OnlyHarness Registry Tools (0)

No explicit tool names declared in metadata yet. Check project README on main listing page.

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).

Claude Task Master Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "eyaltoledano-claude-task-master": {
      "command": "npx",
      "args": [
        "-y",
        "task-master-ai"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "YOUR_ANTHROPIC_API_KEY_HERE",
        "PERPLEXITY_API_KEY": "YOUR_PERPLEXITY_API_KEY_HERE",
        "OPENAI_API_KEY": "YOUR_OPENAI_API_KEY_HERE",
        "GOOGLE_API_KEY": "YOUR_GOOGLE_API_KEY_HERE",
        "MISTRAL_API_KEY": "YOUR_MISTRAL_API_KEY_HERE",
        "GROQ_API_KEY": "YOUR_GROQ_API_KEY_HERE",
        "OPENROUTER_API_KEY": "YOUR_OPENROUTER_API_KEY_HERE",
        "XAI_API_KEY": "YOUR_XAI_API_KEY_HERE"
      }
    }
  }
}

OnlyHarness Registry Configuration

mcpServers (Claude Desktop / Cursor)

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

Frequently Asked Questions

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

More alternatives to Claude Task Master More alternatives to OnlyHarness Registry Developer Tools category hub