---
title: "s&box MCP Server & AI Skill - s&box library"
description: "18 MCP tools for the s&box editor, and 17 reference files that stop an AI agent writing Unity code into your Source 2 project."
canonical: "https://sbox.watch/libraries/fobiat/sbox_mcp_server/"
generated_at: "2026-08-20T13:51:13.758Z"
---

# s&box MCP Server & AI Skill

18 MCP tools for the s&box editor, and 17 reference files that stop an AI agent writing Unity code into your Source 2 project.

- Type: library
- Ident: fobiat.sbox_mcp_server
- Creator: fobiat
- Canonical: https://sbox.watch/libraries/fobiat/sbox_mcp_server/
- Markdown: https://sbox.watch/libraries/fobiat/sbox_mcp_server.md
- sbox.game: https://sbox.game/fobiat/sbox_mcp_server/
- Generated: 2026-08-20T13:51:13.758Z

## Stats

- 24h momentum: +0
- Terry score: 53%
- Favorites: 3
- Upvotes: 3
- Downvotes: 0
- Updated: Aug 15, 2026
- Created: Aug 15, 2026
- Size: 56.1 KB
- Files: 7
- Tags: agent, ai, api, automation, claude, code, development, editor

## Description

Lead: the .sbproj field you changed that did nothing, the .config that did nothing, the clean build still running yesterday's code. Then two labelled halves.

The MCP Server. Eighteen tools, grouped ask-the-live-engine (8), ask-the-editor (6), change-something (4). The six ways an edit disappears table. 127.0.0.1:7269, loopback, and the claude mcp add --transport http sbox line. The one that reads as a bug and is not: the tools never appear in a client's tool list, reach them via search\_tools and call\_tool.

The AI Agent Skill. 17 reference files, the router explanation, the Unity translation table, 14\_VERIFICATION as the file that matters most, and the four prompt patterns. Say plainly that the skill is not inside the package, because a library ships code rather than documentation, and give the clone and /plugin install routes.

visit https://github.com/fobiat/sbox-skill for more information.

Close on status (engine 26.08.05, both nullable configurations, 14 of 18 tools called live), MIT, and the three links: the repo, fobiat.dev/blog/p/sbox-skill, fobiat.dev.