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Model Context Protocol v2024-11-05 через stdio. Транспорт JSON-RPC 2.0, 13 нативных инструментов на C, zero-copy парсинг сообщений.

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

Обзор

scorpiox code реализует Model Context Protocol (MCP) как нативный C-сервер. Слой MCP работает через stdio с фреймингом JSON-RPC 2.0 — AI-клиент подключается через stdin/stdout и вызывает инструменты через структурированные JSON-сообщения. Все 13 инструментов компилируются в бинарник из sx_tools.c без runtime-зависимостей.

# 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

Транспортный уровень

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": [...]}}

Инициализация

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": {}}

Методы JSON-RPC

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

Метод Направление 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
}}

Каталог инструментов (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

Параметры: command, timeout
Обязательные: command
ReadImage filesystem

Read an image file and display it visually

Параметры: file_path
Обязательные: file_path
ReadDocs web

Fetch URL content as markdown via headless browser

Параметры: url, format, wait_ms
Обязательные: url
WebSearch search

Search the web using 11 engines concurrently

Параметры: query
Обязательные: query
TaskManager workflow

Manage persistent tasks with create/add/complete

Параметры: action, query, task_id, step_id, text
Обязательные: action, query
PlanMode workflow

Manage plan mode for complex tasks

Параметры: action, goal, plan_file
Обязательные: action
AskUserQuestion interaction

Ask interactive multiple-choice questions via TUI

Параметры: questions_json
Обязательные: questions_json
InvokeSkill workflow

Invoke a skill by name for reusable workflows

Параметры: skill_name, arguments
Обязательные: skill_name
BackgroundBash shell

Execute bash command in background, returns immediately

Параметры: command
Обязательные: command
ReadBgOutput shell

Read new output from a background task

Параметры: task_id
Обязательные: task_id
ListBgTasks shell

List all background tasks with status and runtime

Параметры: —
Обязательные: —
KillBgTask shell

Kill a running background task by ID

Параметры: task_id
Обязательные: task_id
SetCallback workflow

Manage scheduled callback messages with repeats

Параметры: action, message, delay_seconds, repeat_count, callback_id
Обязательные: action

Справочник схем инструментов

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

Bash shell
ПараметрыTypeStatusDescription
command string required The bash command to execute
timeout integer optional Timeout in milliseconds (default: 30000)
ReadImage filesystem
ПараметрыTypeStatusDescription
file_path string required The absolute path to the image file
ReadDocs web
ПараметрыTypeStatusDescription
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
ПараметрыTypeStatusDescription
query string required The search query
TaskManager workflow
ПараметрыTypeStatusDescription
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
ПараметрыTypeStatusDescription
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
ПараметрыTypeStatusDescription
questions_json string required JSON string with questions and options
InvokeSkill workflow
ПараметрыTypeStatusDescription
skill_name string required The skill name to invoke
arguments string optional Arguments to pass to the skill
BackgroundBash shell
ПараметрыTypeStatusDescription
command string required The bash command to execute
ReadBgOutput shell
ПараметрыTypeStatusDescription
task_id integer required The task ID returned by BackgroundBash
KillBgTask shell
ПараметрыTypeStatusDescription
task_id integer required The task ID to kill
SetCallback workflow
ПараметрыTypeStatusDescription
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

Конфигурация

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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