gangway 0.1.3

A smart Agent-to-Server Bridge connecting AI agents to remote environments as an MCP server and REST API.

Gangway

A smart Agent-to-Server Bridge connecting AI agents (like Cursor and Claude Desktop) to remote environments (VPS, Kaggle, Colab) for full control, functioning as both an MCP server and a REST API.

Features

• Directory State Management: Maintains and tracks the active working directory (CWD) across execution contexts, resolving relative paths and enforcing sandbox directory checks (allowed_root) to prevent path traversal.
• Background Job Control: Execute long-running shell commands asynchronously. Captures logs (stdout and stderr) to disk. Supports recursive process tree termination (on Unix and Windows) and prevents PID recycling exploits.
• Robust MCP Server: Provides standard stdio transport and SSE (Server-Sent Events) HTTP transport modes using Starlette and Uvicorn.
• Bearer Token Authentication: Enforces token authentication case-insensitively in headers or query parameters for SSE transport.
• Zero-Dependency Core: Leverages the low-level mcp library, standard libraries, starlette, uvicorn, psutil, and tomli.

Installation

Install from your local build or PyPI:

pip install gangway

Run with uvx (No Installation Required)

You can run Gangway as an MCP server instantly without installing it globally using uvx:

uvx gangway --transport stdio --token YOUR_SECRET_TOKEN --allowed-root /path/to/sandbox

Configuration

Gangway can be configured via Environment Variables, JSON/TOML configuration files, or CLI arguments (CLI arguments take the highest precedence).

Configuration Parameters

CLI Argument	Environment Variable	Configuration Key	Default	Description
--token	GANGWAY_TOKEN	token	None	Bearer token required for authentication.
--allowed-root	GANGWAY_ALLOWED_ROOT	allowed_root	None	Limit directory interactions to this root path.
--port	GANGWAY_PORT	port	8000	Port to run the SSE web server on.
--host	GANGWAY_HOST	host	127.0.0.1	Host address to bind the SSE server to.
--transport	-	-	stdio	Transport mode (stdio or sse).

CLI Usage

To run the server using stdio transport:

# If installed globally:
gangway --transport stdio --token secret-token --allowed-root /path/to/sandbox

# Or run instantly with uvx:
uvx gangway --transport stdio --token secret-token --allowed-root /path/to/sandbox

To run the server using sse transport:

# If installed globally:
gangway --transport sse --host 127.0.0.1 --port 8000 --token secret-token --allowed-root /path/to/sandbox

# Or run instantly with uvx:
uvx gangway --transport sse --host 127.0.0.1 --port 8000 --token secret-token --allowed-root /path/to/sandbox

Using a configuration file:

# If installed globally:
gangway --config /path/to/config.toml --transport sse

# Or run instantly with uvx:
uvx gangway --config /path/to/config.toml --transport sse

Register in AI Clients (Claude Desktop / Cursor)

Claude Desktop

Add the following to your claude_desktop_config.json (usually located at %APPDATA%\Claude\claude_desktop_config.json on Windows or ~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

{
  "mcpServers": {
    "gangway": {
      "command": "uvx",
      "args": [
        "gangway",
        "--transport", "stdio",
        "--token", "YOUR_SECRET_TOKEN",
        "--allowed-root", "/path/to/sandbox"
      ]
    }
  }
}

Cursor / VSCode

1. Open Cursor Settings -> Features -> MCP.
2. Click + Add New MCP Server.
3. Enter:
   • Name: gangway
   • Type: command
   • Command: uvx gangway --transport stdio --token YOUR_SECRET_TOKEN --allowed-root /path/to/sandbox

Exposed MCP Tools

Gangway exposes 16 tools to connecting AI agents:

File Operations

1. list_directory: Lists directory contents, returning file size and modification time.
2. glob_search: Performs recursive file searches using glob patterns.
3. preview_file: Safely previews a file by returning the first N lines and last M lines, avoiding token pollution.
4. project_overview: Scans files up to depth 3, lists the 10 most recently modified files, and reads README.md.
5. upload_chunk: Uploads base64-encoded file chunks for remote storage.
6. assemble_upload: Assembles uploaded file chunks into a single file.
7. download_chunk: Downloads a chunk of a remote file.
8. compress_archive: Compresses a target directory into a .zip, .tar.gz, or .tgz archive.
9. extract_archive: Extracts a .zip or .tar.gz archive to a target directory.

Directory State

10. get_working_directory: Returns the current active working directory (CWD).
11. change_working_directory: Changes the active working directory (validates against allowed root).

Background Jobs

12. start_background_job: Spawns a command asynchronously in the background.
13. get_job_status: Gets metadata, exit code, and run status of a job.
14. list_background_jobs: Lists all background jobs sorted chronologically.
15. read_job_logs: Previews logs for a specific background job.
16. kill_background_job: Recursively kills a background job's process tree.