mcp2cli

A powerful CLI tool for interacting with MCP (Model Context Protocol) servers

Quick Usage

# Install
go install github.com/weibaohui/mcp2cli@latest

# List configured servers (no server connection)
mcp

# Inspect a server's available tools
mcp openDeepWiki

# View tool details with parameter examples
mcp openDeepWiki list_repositories

# Call a tool
mcp openDeepWiki list_repositories limit=3

# Call with typed arguments (recommended)
mcp openDeepWiki list_repositories limit:number=3 enabled:bool=true

Argument Format

Arguments can be in two formats:

# Simple key=value (string type by default)
mcp server tool name=John age=30

# Typed key:type=value (recommended for precision)
mcp server tool name:string=John age:number=30 enabled:bool=true

Supported types: string, number, int, float, bool

Features

🔍 Discover Servers - List all configured MCP servers without connecting
📋 Explore Tools - View detailed tool information with formatted parameters
🚀 Invoke Tools - Call tools directly with type-safe arguments
🔌 Multiple Transports - Support for SSE, Streamable HTTP, and Stdio
📁 Smart Config - Auto-detects and merges configs from standard locations
📤 Unified JSON Output - Machine-readable output for scripting

Installation

Binary (latest release)

Download from GitHub Releases

From source

go install github.com/weibaohui/mcp2cli@latest

Build from source

git clone https://github.com/weibaohui/mcp2cli.git
cd mcp2cli
make build

Configuration

Create ~/.config/mcp/config.json:

{
  "mcpServers": {
    "openDeepWiki": {
      "url": "https://opendeepwiki.k8m.site/mcp/streamable",
      "timeout": 30000
    }
  }
}

Config File Search Paths

| Platform | Priority Order | |----------|---------------| | macOS/Linux | ~/.config/modelcontextprotocol/mcp.json → ~/.config/mcp/config.json → ./mcp.json → ./.mcp/config.json → /etc/mcp/config.json | | Windows | %APPDATA%\modelcontextprotocol\mcp.json → %APPDATA%\mcp\config.json → %USERPROFILE%\.mcp\config.json → .\mcp.json → .\.mcp\config.json |

Config File Format

{
  "mcpServers": {
    "serverName": {
      "transport": "streamable",
      "url": "https://example.com/mcp",
      "command": "npx",
      "args": ["-y", "@server/mcp"],
      "env": {"KEY": "value"},
      "timeout": 30000
    }
  }
}

Transport Types: | Type | Description | |------|-------------| | streamable | Modern streaming HTTP (default) | | sse | Server-Sent Events over HTTP | | stdio | Local subprocess communication |

Command Reference

# List all configured servers
mcp

# Get server info with tools list
mcp <server_name>

# Get tool details with parameter examples
mcp <server_name> <tool_name>

# Call a tool with arguments
mcp <server_name> <tool_name> <key=value> [key2=value2]...

Output Format

All commands return unified JSON:

{
  "success": true,
  "data": {
    "configFiles": ["/home/user/.config/mcp/config.json"],
    "servers": [
      {
        "name": "openDeepWiki",
        "transport": "streamable",
        "url": "https://opendeepwiki.k8m.site/mcp/streamable"
      }
    ]
  },
  "meta": {
    "timestamp": "2026-03-24T10:00:00Z",
    "version": "v0.2.8"
  }
}

Architecture

cmd/mcp/main.go          # CLI entry point, argument routing
internal/mcp/
  ├── types.go           # Error codes, shared types
  ├── config.go          # Config loading & merging
  ├── config_paths.go    # Platform-specific paths
  ├── client.go          # MCP server client
  ├── dispatcher.go      # Multi-server coordination
  └── formatter.go       # Schema formatting, arg parsing

Development

# Build for current platform
make build

# Build for all platforms
make build-all

# Run tests
make test

# Lint code
make lint

License

MIT License - see LICENSE for details.

MCP Servers