sbox-mcp-documentation

An MCP (Model Context Protocol) server that provides AI assistants with searchable access to the full s&box game engine documentation — 180+ pages of guides, tutorials, and concepts — plus the complete API reference with 1,800+ types and 15,000+ members.

Quick Start

No installation required — use npx directly in your MCP config:

{
    "servers": {
        "sbox-docs": {
            "type": "stdio",
            "command": "npx",
            "args": ["-y", "sbox-mcp-documentation"]
        }
    }
}

Or install globally:

npm install -g sbox-mcp-documentation

Features

Documentation

• Full-text search across all s&box documentation with fuzzy matching and relevance ranking
• Direct page retrieval with chunked reading for large pages
• Category browsing to discover available documentation topics

API Reference

• API type search across 1,800+ public types (classes, structs, enums, interfaces) with member-aware ranking
• Detailed type lookup — methods, properties, fields, events, XML doc comments, and inheritance info
• Chunked output for large types so no detail is truncated

General

• Automatic caching — docs cached for 4 hours, API schema cached for 24 hours
• Background indexing on startup — both subsystems ready within seconds
• Built-in self-tests to verify the server is working correctly

Data Sources

Documentation

Documentation is fetched from the official s&box wiki via the LLM-optimized index at sbox.game/llms.txt. This file lists all available documentation pages, and each page is fetched as raw Markdown from sbox.game/dev/doc/{page}.md. The server crawls all listed pages and builds a local search index using MiniSearch.

API Reference

The API schema is downloaded from the Facepunch CDN as a JSON file (the same data powering sbox.game/api). It contains all public types from the s&box assembly — 1,800+ types with full member signatures, XML doc comments, and inheritance info. The server strips internal/compiler-generated types and indexes everything with MiniSearch for fast fuzzy lookup.

Installation

Option 1: npx (recommended)

No install needed. Just reference npx sbox-mcp-documentation in your MCP configuration (see below).

Option 2: Global install

npm install -g sbox-mcp-documentation

Option 3: From source

git clone https://github.com/fiedlermarius/sbox-mcp-documentation.git
cd sbox-mcp-documentation
npm install
npm run build

Configuration

VS Code (GitHub Copilot)

Add to .vscode/mcp.json in your workspace:

{
    "servers": {
        "sbox-docs": {
            "type": "stdio",
            "command": "npx",
            "args": ["-y", "sbox-mcp-documentation"]
        }
    }
}

Cursor

Add to .cursor/mcp.json:

{
    "mcpServers": {
        "sbox-docs": {
            "command": "npx",
            "args": ["-y", "sbox-mcp-documentation"]
        }
    }
}

Claude Desktop

Add to your Claude Desktop config (%APPDATA%/Claude/claude_desktop_config.json on Windows):

{
    "mcpServers": {
        "sbox-docs": {
            "command": "npx",
            "args": ["-y", "sbox-mcp-documentation"]
        }
    }
}

Local Checkout Example

If you want to use a local checkout instead of npx, update your configuration as follows:

{
    "servers": {
        "sbox-docs": {
            "type": "stdio",
            "command": "node",
            "args": ["<path-to-repo>/dist/index.js"]
        }
    }
}

As shown above, you need to replace "command": "npx" and "args" with "command": "node" and "args": ["<path-to-repo>/dist/index.js"].

Tools

Tool	Description
sbox_search_docs	Search documentation with fuzzy matching. Returns titles, URLs, categories, and relevant snippets. Supports category filtering and result limits.
sbox_get_doc_page	Fetch a specific documentation page as Markdown. Supports chunked reading via start_index and max_length for large pages.
sbox_list_doc_categories	List all documentation categories with page counts. Useful for discovering what topics are available.
sbox_search_api	Search the s&box API reference by type name, namespace, or keyword. Returns matching types with namespace, description, and top member names.
sbox_get_api_type	Get full details for a specific API type — all methods, properties, fields, events, XML doc comments, and inheritance. Supports chunked output for large types.
sbox_cache_status	Show cache and index health — page counts, freshness, and whether both docs and API indexing are complete.
sbox_run_tests	Run built-in self-tests for all six modules (cache, search, crawler — docs and API). Returns pass/fail results per test case.

Architecture

sbox.game/llms.txt (doc index)            cdn.sbox.game (AssemblySchema JSON)
        │                                           │
        ▼                                           ▼
   DocCrawler ──► GET /llms.txt             ApiCrawler ──► resolves schema URL
        │         GET /dev/doc/*.md               │         downloads + filters types
        │                                           │
        ▼                                           ▼
     DocCache ──► ~/.sbox-docs-mcp/cache/       ApiCache ──► ~/.sbox-docs-mcp/cache/
        │        manifest.json (TTL 4h)              │        api-types.json (TTL 24h)
        │                                           │
        ▼                                           ▼
   DocSearch ──► MiniSearch index            ApiSearch ──► MiniSearch index
                 title (3x), category (2x),              name (4x), fullName (3x),
                 content (1x)                            members (2x), namespace (1.5x)

Cache Behavior

• Location: ~/.sbox-docs-mcp/cache/
• Docs TTL: 4 hours (configurable via SBOX_DOCS_CACHE_TTL env var, in seconds)
• API TTL: 24 hours — the schema is large (~9 MB) and changes infrequently
• Custom directory: Set SBOX_DOCS_CACHE_DIR env var
• Both caches are populated on server startup in the background
• Set SBOX_API_SCHEMA_URL to pin a specific schema version

Related Projects

• Facepunch.AssemblySchema — the schema format this server uses for API reference data

License

MIT