# Give a coding agent eyes inside the game engine with your own MCP server

> A streamer who saw models struggle at game dev on an earlier stream built his own MCP server that hooks Opus 5.5 into the s&box engine, so the agent works inside the editor instead of guessing, and used a swarm of agents to build a game about stopping an AI swarm.

- URL: https://paperchasewebb.ai/bots/marketplace/items/give-a-coding-agent-eyes-inside-the-game-engine-with-your-own-mcp-server/
- Type: Agent use case pack
- Category: Games
- By: PaperChaseWebb
- Works with: Plain .md
- Price: Free USD
- Difficulty: Advanced
- Setup time: 1 hr
- Time to result: One working session
- Format: Markdown (.md) file, give-a-coding-agent-eyes-inside-the-game-engine-with-your-own-mcp-server.md
- Version: 1.0, updated 2026-10-26
- License: Personal and commercial use. Credit the original source when you share the workflow.

## What you end up with

The lesson matches other engine integrations: agents do much better when they can query the scene and see results than when they only edit files blind.

## What you get

- A plain-language summary of the workflow
- A fill-in prompt template
- What to watch out for
- A link to the original source

## Who it is for

Builders who already use AI agents and want a proven workflow they can copy into their own project.

## Tools needed

- Opus 5.5: plans and writes the game
- Custom MCP server: connects the model to the s&box editor
- s&box: game engine
- You need: An AI coding agent or chat model
- You need: A small real task to try it on

Cost to run: Free with the agent plan you already use.

## How it works

1. **Read what they did.** Skim the source post linked below, then the summary on this page. Expected: You know the setup and the one rule that made it work.
2. **Fill in the template.** Copy the prompt and replace every [bracketed] value with your own project details. Expected: A prompt that fits your project.
3. **Run it once and check.** Run it on a small task first and confirm the result yourself before you trust it on real work. Expected: One verified run.

## Sample prompt: Workflow template (Opus 5.5, Custom MCP server)

```
Expose engine actions and scene state through a small MCP server
Let the agent read the scene before editing it
Decide up front whether agents plan the build or only write code
```

Adapted by PaperChaseWebb. Not the original author's prompt.

## Free preview of give-a-coding-agent-eyes-inside-the-game-engine-with-your-own-mcp-server.md

````markdown
# Give a coding agent eyes inside the game engine with your own MCP server

PaperChase agent use case (free feed entry), version 1.0. Source: [WillMakesTV (@WillMakesTV on X)](https://x.com/WillMakesTV/status/2113620727312355544), 2026-10-23.

## What they did

He wrote an MCP server that exposes the s&box engine to the model, then ran the build live on YouTube with several agents working on the project.

## Worth knowing

The lesson matches other engine integrations: agents do much better when they can query the scene and see results than when they only edit files blind. The full process is in the video rather than a written guide.
````

## Worth knowing

- The lesson matches other engine integrations: agents do much better when they can query the scene and see results than when they only edit files blind. The full process is in the video rather than a written guide.
- Figures are as reported by the original author and were not re-measured by us.

## Questions

**Where does this come from?** A public post credited to WillMakesTV (@WillMakesTV on X). Source: https://x.com/WillMakesTV/status/2113620727312355544

**Is it free?** Yes. Feed entries are free to read and download.

## How to get it

Free sample. Download it directly at https://paperchasewebb.ai/bots/marketplace/items/give-a-coding-agent-eyes-inside-the-game-engine-with-your-own-mcp-server/, no signup.

Seller: PaperChaseWebb Inc., mgmt@paperchasewebb.com