MCP Gerrit Code Review

MCP Server providing AI agents with tooling for Gerrit code review workflows via stdio transport.

Features

• 19 tools across 4 categories: Changes, Accounts, Projects, Server
• Dual transport: HTTP (REST API) or SSH (gerrit CLI commands)
• Dynamic tool registration: Tools auto-enable based on server capabilities
• Basic Auth with env vars or ~/.netrc fallback (HTTP mode)
• SSH key auth with env vars or ~/.ssh/id_rsa fallback (SSH mode)
• TypeScript strict mode with Zod input validation
• ESM modules with stdio transport

Installation

Option 1: Install from npm (Recommended)

npx mcp-gerrit-code-review

Or install globally:

npm install -g mcp-gerrit-code-review

Option 2: Build from source

git clone https://github.com/coveyjorjet/mcp-gerrit-code-review.git
cd mcp-gerrit-code-review
npm install && npm run build

Configuration

HTTP Transport (Default)

Set via environment variables:

export GERRIT_URL=https://gerrit.example.com
export GERRIT_USERNAME=your-username
export GERRIT_PASSWORD=your-http-password

Or use ~/.netrc:

machine gerrit.example.com
  login your-username
  password your-http-password

SSH Transport

Set transport mode and SSH connection details:

export GERRIT_TRANSPORT=ssh
export GERRIT_SSH_HOST=gerrit.example.com
export GERRIT_SSH_USER=your-username
export GERRIT_SSH_PORT=29418  # optional, defaults to 29418
export GERRIT_SSH_KEY=~/.ssh/id_rsa  # optional, defaults to ~/.ssh/id_rsa
export GERRIT_SSH_KEY_PASSPHRASE=your-passphrase  # optional

Or use SSH URL format in GERRIT_URL:

export GERRIT_TRANSPORT=ssh
export GERRIT_URL=ssh://your-username@gerrit.example.com:29418

SSH credentials are resolved from ~/.netrc for username if not specified.

Usage

Using with OpenCode

Add to your opencode.json or opencode.jsonc:

Using npm package (HTTP)

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "mcp-gerrit-code-review": {
      "type": "local",
      "command": ["npx", "-y", "mcp-gerrit-code-review"],
      "enabled": true,
      "environment": {
        "GERRIT_URL": "https://gerrit.example.com",
        "GERRIT_USERNAME": "your-username",
        "GERRIT_PASSWORD": "your-http-password"
      }
    }
  }
}

Using npm package (SSH)

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "mcp-gerrit-code-review": {
      "type": "local",
      "command": ["npx", "-y", "mcp-gerrit-code-review"],
      "enabled": true,
      "environment": {
        "GERRIT_TRANSPORT": "ssh",
        "GERRIT_SSH_HOST": "gerrit.example.com",
        "GERRIT_SSH_USER": "your-username",
        "GERRIT_SSH_KEY": "/path/to/private/key"
      }
    }
  }
}

Using local build

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "mcp-gerrit-code-review": {
      "type": "local",
      "command": ["node", "/path/to/mcp-gerrit-code-review/dist/index.js"],
      "enabled": true,
      "environment": {
        "GERRIT_URL": "https://gerrit.example.com",
        "GERRIT_USERNAME": "your-username",
        "GERRIT_PASSWORD": "your-http-password"
      }
    }
  }
}

Other MCP Clients

Add to your MCP client configuration:

Using npm package (HTTP)

{
  "mcpServers": {
    "mcp-gerrit-code-review": {
      "command": "npx",
      "args": ["-y", "mcp-gerrit-code-review"],
      "env": {
        "GERRIT_URL": "https://gerrit.example.com",
        "GERRIT_USERNAME": "your-username",
        "GERRIT_PASSWORD": "your-http-password"
      }
    }
  }
}

Using npm package (SSH)

{
  "mcpServers": {
    "mcp-gerrit-code-review": {
      "command": "npx",
      "args": ["-y", "mcp-gerrit-code-review"],
      "env": {
        "GERRIT_TRANSPORT": "ssh",
        "GERRIT_SSH_HOST": "gerrit.example.com",
        "GERRIT_SSH_USER": "your-username",
        "GERRIT_SSH_KEY": "/path/to/private/key"
      }
    }
  }
}

Using local build

{
  "mcpServers": {
    "mcp-gerrit-code-review": {
      "command": "node",
      "args": ["dist/index.js"],
      "env": {
        "GERRIT_URL": "https://gerrit.example.com",
        "GERRIT_USERNAME": "your-username",
        "GERRIT_PASSWORD": "your-http-password"
      }
    }
  }
}

Tools

| Category | Tools | Description | |----------|-------|-------------| | Changes | query_changes, get_change_details, list_change_files, get_file_diff, get_commit_message, post_review, post_review_comment, list_change_comments, submit_change, abandon_change, restore_change, list_reviewers, add_reviewer | Code review operations | | Accounts | get_account, query_accounts | User account management (HTTP only) | | Projects | list_projects | Project discovery | | Server | get_server_version, get_server_info | Server metadata (info: HTTP only) |

⚠️ Mutation tools (post_review, post_review_comment, submit_change, abandon_change, restore_change, add_reviewer) modify Gerrit state — confirm with user before calling.

📝 Note: Available tools depend on transport mode and Gerrit server capabilities. Tools are dynamically registered at startup based on what the server supports.

Architecture

src/
├── index.ts              # Entry point, MCP server setup
├── gerrit/
│   ├── client.ts         # Gerrit API wrapper with HTTP/SSH transport
│   └── types.ts          # TypeScript interfaces
├── tools/
│   ├── changes.ts        # 13 change-related tools
│   ├── accounts.ts       # 2 account tools (HTTP only)
│   ├── projects.ts       # 1 project tool
│   └── server.ts         # 2 server tools
└── utils/
    └── parsing.ts        # Credential resolution, SSH config parsing

Development

npm run dev          # Watch mode rebuild
npm test             # Run tests once
npm run test:watch   # Watch mode tests
npm run lint         # Type check (tsc --noEmit)

License

MIT