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

OnlyHarness Registry belongs to the Developer Tools category with local stdio execution, while Claude Task Master belongs to the Developer Tools category with local stdio execution.

How do I install OnlyHarness Registry or Claude Task Master 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 OnlyHarness Registry and Claude Task Master free or paid?

OnlyHarness Registry operates under a Free / Open Source model (No auth required). Claude Task Master operates under a BYOK (Pay Provider Direct) model (API Key required).

Which MCP server has more tools and community activity?

OnlyHarness Registry lists 0 tools with 0 views and 0 GitHub stars. Claude Task Master lists 5 tools with 7 views and 27,975 GitHub stars.

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

OnlyHarness Registry is listed under a Free / Open Source model with No auth required . Claude Task Master operates under a BYOK (Pay Provider Direct) model with API Key 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 OnlyHarness Registry and Claude Task Master at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both onlyharness-registry and eyaltoledano-claude-task-master 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, OnlyHarness Registry has a Quality Score of 27 /100 ( Emerging ) with 0 views, 0 installs, and 0 GitHub stars. Claude Task Master holds a Quality Score of 61 /100 ( Good ) with 7 views, 0 installs, and 27,975 GitHub stars.

Side-by-Side Model Context Protocol Comparison

OnlyHarness Registry vs Claude Task Master

In-depth architectural comparison of the OnlyHarness Registry and Claude Task Master 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

OnlyHarness Registry

Developer Tools · Local stdio

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

Claude Task Master

Developer Tools · Local stdio

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

Verdict Summary: Choose OnlyHarness Registry if you need specialized Developer Tools tools running via a local process. Choose Claude Task Master 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 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

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.

Feature & Specification Comparison

Specification	O OnlyHarness Registry Developer Tools	Claude Task Master eyaltoledano Developer Tools
Summary	Search, inspect, pull and publish reusable AI-agent harnesses from onlyharness.com.	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.
Category & Scope	Developer Tools

Tools & Capabilities Breakdown

OnlyHarness Registry Tools (0)

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

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

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).

OnlyHarness Registry Configuration

mcpServers (Claude Desktop / Cursor)

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

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"
      }
    }
  }
}

Frequently Asked Questions

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

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