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Agent Harnesses

Agent Harnesses is an MCP server that adds developer tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Agent-harness picks, decision guides, and setup templates; live GitHub/HN discovery. It has 1,086 GitHub stars, is released under the CC-BY-SA-4.0 license and runs locally with uvx agent-harnesses-mcp.

github.com/RyanAlberts/best-of-Agent-Harnesses (opens in a new tab)

View on GitHub (opens in a new tab)

Install Agent Harnesses

Generated from the server's MCP registry entry. Replace your-value with your own values.

Claude Desktop

claude_desktop_config.json
{
  "mcpServers": {
    "agent-harnesses": {
      "command": "uvx",
      "args": [
        "agent-harnesses-mcp"
      ]
    }
  }
}

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

Claude Code

claude mcp add --transport stdio agent-harnesses -- uvx agent-harnesses-mcp

Cursor

.cursor/mcp.json
{
  "mcpServers": {
    "agent-harnesses": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "agent-harnesses-mcp"
      ]
    }
  }
}

Project file; use ~/.cursor/mcp.json to enable it in every project.

VS Code

.vscode/mcp.json
{
  "servers": {
    "agent-harnesses": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "agent-harnesses-mcp"
      ]
    }
  }
}

Config formats checked against the official docs on Oct 7, 2026: modelcontextprotocol.io (opens in a new tab), code.claude.com (opens in a new tab), cursor.com (opens in a new tab), code.visualstudio.com (opens in a new tab).

About Agent Harnesses

Best of Agent Harnesses and Harness Techniques 🏆  Curated list of AI agent harnesses, orchestration frameworks, and harness techniques for reliable agentic systems.

  • agent-framework
  • agent-harness
  • agentic-ai
  • agents
  • ai-agents
  • ai-tools
  • awesome-list
  • best-of-list
  • claude-code
  • coding-agents

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FAQ

Agent Harnesses FAQ

Still curious? Email info@appsgit.com.

What is Agent Harnesses?

Agent Harnesses is an MCP server that adds developer tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Agent-harness picks, decision guides, and setup templates; live GitHub/HN discovery. It has 1,086 GitHub stars, is released under the CC-BY-SA-4.0 license and runs locally with uvx agent-harnesses-mcp. The source code is at github.com/RyanAlberts/best-of-Agent-Harnesses.

How do I install the Agent Harnesses MCP server?

Add the command uvx agent-harnesses-mcp to your MCP client: put it in claude_desktop_config.json for Claude Desktop, run claude mcp add for Claude Code, or add it to .cursor/mcp.json (Cursor) or .vscode/mcp.json (VS Code). The snippets on this page are ready to paste.

Is Agent Harnesses free?

The server is open source under the CC-BY-SA-4.0 license, so running it is free. It does not declare any required API key.

Is Agent Harnesses actively maintained?

The most recent commit was on Oct 4, 2026. The latest release is list-2026-09-2, published Sep 14, 2026. appsgit only lists MCP servers with a commit in the last six months and re-checks every server daily.