metaharness

MCP server by ruvnet · ★ 699 · updated today

Developer ToolsMaintainedRemote availableOne-click install

🛠️ The meta-harness for AI agents — scaffold your own focused, branded agent harness with its own npx CLI, MCP server, memory, learning loop, and witness-signed releases. Works with Claude Code, Codex, pi.dev, Hermes, OpenClaw, and RVM (hardware-isolated sandbox).

Install View on GitHub Website

Install metaharness

Choose your AI client and copy the config.

Add to claude_desktop_config.json — macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Then restart Claude. Setup guide

{
  "mcpServers": {
    "metaharness": {
      "command": "npx",
      "args": [
        "metaharness",
        "my-bot",
        "--template",
        "vertical:coding",
        "--host",
        "claude-code"
      ]
    }
  }
}

Add to Cursor

Or add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project). Setup guide

{
  "mcpServers": {
    "metaharness": {
      "command": "npx",
      "args": [
        "metaharness",
        "my-bot",
        "--template",
        "vertical:coding",
        "--host",
        "claude-code"
      ]
    }
  }
}

Install in VS Code

Or add to .vscode/mcp.json in your workspace. Setup guide

{
  "servers": {
    "metaharness": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "metaharness",
        "my-bot",
        "--template",
        "vertical:coding",
        "--host",
        "claude-code"
      ]
    }
  }
}

Cascade → Actions → Open MCP config file (often ~/.config/devin/mcp_config.json). Setup guide

{
  "mcpServers": {
    "metaharness": {
      "command": "npx",
      "args": [
        "metaharness",
        "my-bot",
        "--template",
        "vertical:coding",
        "--host",
        "claude-code"
      ]
    }
  }
}

Run in your terminal: Setup guide

claude mcp add metaharness -- npx metaharness my-bot --template vertical:coding --host claude-code

CLI or add to ~/.codex/config.toml. Setup guide

codex mcp add metaharness -- npx metaharness my-bot --template vertical:coding --host claude-code

[mcp_servers.metaharness]
command = "npx"
args = ["metaharness", "my-bot", "--template", "vertical:coding", "--host", "claude-code"]

Cline panel → Configure MCP Servers, or ~/.cline/data/settings/cline_mcp_settings.json. Setup guide

{
  "mcpServers": {
    "metaharness": {
      "command": "npx",
      "args": [
        "metaharness",
        "my-bot",
        "--template",
        "vertical:coding",
        "--host",
        "claude-code"
      ]
    }
  }
}

Run the server directly:

npx metaharness my-bot --template vertical:coding --host claude-code

Before you install: Install command taken from the project README. The README mentions API keys or tokens — you'll likely need to add them as environment variables ("env") in the config.

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