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stdio 기반 Model Context Protocol v2024-11-05. JSON-RPC 2.0 전송, C로 구현된 13개 네이티브 도구, 제로카피 메시지 파싱.

v2024-11-05MCP Version
stdioTransport
13Tools
JSON-RPC 2.0Protocol

개요

scorpiox code는 Model Context Protocol(MCP)을 네이티브 C 서버로 구현합니다. MCP 계층은 JSON-RPC 2.0 프레이밍으로 stdio 위에서 실행되며, AI 클라이언트는 stdin/stdout을 통해 연결하고 구조화된 JSON 메시지로 도구를 호출합니다. 13개 도구 모두 sx_tools.c에서 바이너리로 컴파일되며 런타임 의존성은 없습니다.

# MCP server architecture (from sx_tools.c)

stdin  ──▶  JSON-RPC parser  ──▶  tool dispatcher  ──▶  result  ──▶  stdout

# All tools compiled into single static binary
# Source: scorpiox/libsxutil/sx_tools.c
# Zero runtime dependencies — no Node.js, no Python, no JVM

전송 계층

The MCP server uses stdio as its transport — the simplest, most reliable pipe. The AI client spawns the scorpiox binary and communicates via stdin/stdout using newline-delimited JSON-RPC 2.0 messages. No HTTP server, no WebSocket, no port binding. 

# Transport: stdio (stdin/stdout)
# Framing: newline-delimited JSON-RPC 2.0
# Each message is a single JSON object terminated by \n

# Client sends request →
{"jsonrpc": "2.0", "id": 1, "method": "tools/list", "params": {}}

# Server responds ←
{"jsonrpc": "2.0", "id": 1, "result": {"tools": [...]}}

초기화 핸드셰이크

Before calling tools, the client must complete the MCP initialization handshake. This establishes the protocol version and declares capabilities. 

# Step 1: Client sends initialize request
{"jsonrpc": "2.0", "id": 1, "method": "initialize", "params": {
  "protocolVersion": "2024-11-05",
  "capabilities": {},
  "clientInfo": {"name": "claude-ai", "version": "1.0"}
}}

# Step 2: Server responds with capabilities
{"jsonrpc": "2.0", "id": 1, "result": {
  "protocolVersion": "2024-11-05",
  "capabilities": {"tools": {}},
  "serverInfo": {"name": "scorpiox-code", "version": "1.0.0"}
}}

# Step 3: Client sends initialized notification
{"jsonrpc": "2.0", "method": "notifications/initialized", "params": {}}

JSON-RPC 메서드

The MCP server handles 4 JSON-RPC methods. All tool invocations go through tools/call.

메서드 방향 Description
initialize client → server Initialize MCP session with protocol version and client capabilities
notifications/initialized client → server Notification sent after successful initialization handshake
tools/list client → server List all tools available from the MCP server
tools/call client → server Call a specific tool with JSON arguments and receive result 
# Example: calling the Bash tool
{"jsonrpc": "2.0", "id": 42, "method": "tools/call", "params": {
  "name": "Bash",
  "arguments": {"command": "ls -la /tmp", "timeout": 5000}
}}

# Server response
{"jsonrpc": "2.0", "id": 42, "result": {
  "content": [{"type": "text", "text": "total 48\ndrwxrwxrwt 12 root root ..."}],
  "isError": false
}}

도구 카탈로그 (13)

All tools are implemented in scorpiox/libsxutil/sx_tools.c and compiled into the static binary. Each tool declares a JSON Schema for input validation.

Bash shell

Execute a bash command

파라미터: command, timeout
필수: command
ReadImage filesystem

Read an image file and display it visually

파라미터: file_path
필수: file_path
ReadDocs web

Fetch URL content as markdown via headless browser

파라미터: url, format, wait_ms
필수: url
WebSearch search

Search the web using 11 engines concurrently

파라미터: query
필수: query
TaskManager workflow

Manage persistent tasks with create/add/complete

파라미터: action, query, task_id, step_id, text
필수: action, query
PlanMode workflow

Manage plan mode for complex tasks

파라미터: action, goal, plan_file
필수: action
AskUserQuestion interaction

Ask interactive multiple-choice questions via TUI

파라미터: questions_json
필수: questions_json
InvokeSkill workflow

Invoke a skill by name for reusable workflows

파라미터: skill_name, arguments
필수: skill_name
BackgroundBash shell

Execute bash command in background, returns immediately

파라미터: command
필수: command
ReadBgOutput shell

Read new output from a background task

파라미터: task_id
필수: task_id
ListBgTasks shell

List all background tasks with status and runtime

파라미터: —
필수: —
KillBgTask shell

Kill a running background task by ID

파라미터: task_id
필수: task_id
SetCallback workflow

Manage scheduled callback messages with repeats

파라미터: action, message, delay_seconds, repeat_count, callback_id
필수: action

도구 스키마 참조

Complete input_schema for each tool, as declared in the tools/list response.

Bash shell
파라미터TypeStatusDescription
command string required The bash command to execute
timeout integer optional Timeout in milliseconds (default: 30000)
ReadImage filesystem
파라미터TypeStatusDescription
file_path string required The absolute path to the image file
ReadDocs web
파라미터TypeStatusDescription
url string required The URL to fetch
format string optional Output format: text, html, or markdown
wait_ms integer optional Wait time for page load in ms
WebSearch search
파라미터TypeStatusDescription
query string required The search query
TaskManager workflow
파라미터TypeStatusDescription
action string required Action: create, add, complete, list, pending, switch
query string required The search query
task_id integer optional Task ID
step_id integer optional Step ID
text string optional Task name or step text
PlanMode workflow
파라미터TypeStatusDescription
action string required Action: enter, exit, status, json, reset
goal string optional Goal/description
plan_file string optional Path to markdown plan file
AskUserQuestion interaction
파라미터TypeStatusDescription
questions_json string required JSON string with questions and options
InvokeSkill workflow
파라미터TypeStatusDescription
skill_name string required The skill name to invoke
arguments string optional Arguments to pass to the skill
BackgroundBash shell
파라미터TypeStatusDescription
command string required The bash command to execute
ReadBgOutput shell
파라미터TypeStatusDescription
task_id integer required The task ID returned by BackgroundBash
KillBgTask shell
파라미터TypeStatusDescription
task_id integer required The task ID to kill
SetCallback workflow
파라미터TypeStatusDescription
action string required Action: set, list, cancel
message string optional Callback message
delay_seconds integer optional Seconds to wait (1-3600)
repeat_count integer optional Times to fire before cancel
callback_id integer optional Callback slot ID

설정

MCP is enabled by default. The server advertises tools capability during initialization. Configuration is handled via scorpiox-env.txt. 

# scorpiox-env.txt — MCP-related settings

TOOLS=true                  # Enable MCP tool serving (default: true)
STREAMING=true              # Stream tool results as they arrive
MODEL=sonnet                # AI model for tool-use conversations

# The MCP server binary path is auto-detected:
# Linux:   ~/.scorpiox/scorpiox-code
# macOS:   ~/.scorpiox/scorpiox-code
# Windows: %USERPROFILE%\.scorpiox\scorpiox-code.exe

# Client config (e.g., Claude Desktop mcp_servers.json):
# {"scorpiox": {"command": "~/.scorpiox/scorpiox-code", "args": []}}
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