Gemini CLI MCP Server

Async wrapper for Gemini CLI to enable parallel task execution in Claude Code.

Features

• Async execution - Run tasks in background without blocking
• Multi-instance - Execute multiple Gemini CLI tasks in parallel
• Zombie process cleanup - Automatic cleanup of finished processes
• Zero configuration - Works out of the box

Quick Start

1. Install

git clone https://github.com/your-username/gemini-cli-mcp-async.git
cd gemini-cli-mcp-async
chmod +x gemini_cli_mcp_async_server.py

2. Configure Claude Code

Add to ~/.claude/settings.json:

{
  "mcpServers": {
    "gemini-cli": {
      "command": "/absolute/path/to/gemini-cli-mcp-async/gemini_cli_mcp_async_server.py",
      "args": [],
      "env": {}
    }
  }
}

3. Restart Claude Code

Usage

Async execution

# Start async task
gemini_cli_execute_async(
    query="your prompt here",
    working_dir="/path/to/project"
)
# Returns: task_id

# Check result
gemini_cli_check_result(task_id="your_task_id")

Parallel execution

# Start multiple tasks
task1 = gemini_cli_execute_async(query="task 1", yolo=True)
task2 = gemini_cli_execute_async(query="task 2", sandbox=True)

# Check results later
result1 = gemini_cli_check_result(task_id=task1)
result2 = gemini_cli_check_result(task_id=task2)

Sync execution

# Immediate result
gemini_cli_execute(
    query="your prompt here",
    timeout=300
)

API Reference

gemini_cli_execute(query, working_dir, sandbox, yolo, approval_mode, experimental_acp, allowed_mcp_server_names, allowed_tools, extensions, include_directories, output_format, screen_reader, debug, additional_args, timeout)

Execute Gemini CLI synchronously and return result immediately.

gemini_cli_execute_async(query, working_dir, sandbox, yolo, approval_mode, experimental_acp, allowed_mcp_server_names, allowed_tools, extensions, include_directories, output_format, screen_reader, debug, additional_args)

Start Gemini CLI task in background and return task_id.

gemini_cli_check_result(task_id)

Check status of async task and return result if completed.

Troubleshooting

Server not showing in Claude Code:

• Check file path is absolute and correct
• Ensure file has execute permissions (chmod +x)
• Verify gemini-cli is installed and accessible

Tasks stuck:

• Check task status with gemini_cli_check_result()
• View debug log: tail -f /tmp/gemini_cli_mcp_debug.log

No output from long tasks:

• Use output_format="stream-json" for better output capture
• Check disk space in /tmp

Configuration

All Gemini CLI parameters are supported. Key options:

• sandbox - Enable sandbox mode
• yolo - Auto-confirm prompts
• approval_mode - Set approval mode ('default', 'auto_edit', 'yolo')
• output_format - Output format ('text', 'json', 'stream-json')
• timeout - Timeout for sync execution (seconds)
• debug - Enable debug logging