Documentation

Connect your own agent

Connect your own agent

Stage Engine can expose your open project to an AI agent you already use. It does that over MCP, an open protocol, rather than through an integration we built for one product.

What it is

Stage Engine runs an MCP server that hands out the world tools — terrain, water, environment, weather, the player and placed objects — to whatever agent you connect. The dialog in the app puts it plainly: let Claude or Codex build in the project you have open.

MCP is the Model Context Protocol. It is a shared standard, not something we invented for this feature, and the server is an ordinary one: any MCP client that can start a local server can be pointed at it. The app gives you ready-made commands for Claude Code and for Codex because those are the two most people are using.

This is the reverse of connecting your own ChatGPT account. There, your account powers Director 1 inside our app. Here, your agent stays where it is and reaches into your project.

Turning it on

  1. Sign in, and be on a paid plan. The dialog says "Available on Indie and Pro" if you are not, with a route to upgrade.
  2. Open the account menu and choose MCP connection.
  3. Press Turn on.
  4. Copy the command for your agent — there is a copy button beside each one — and run it. That registers Stage Engine with your agent as an MCP server.

The commands contain paths that are specific to your machine and to this installation, which is why the dialog hands them to you rather than printing a generic line you could type from memory.

What your agent can and cannot reach

A connected agent gets the six world tools and nothing else. The asset tools Director 1 uses are not exposed this way.

Work done by your agent lands in its own chat, named "Your agent", so it is never mixed up with a conversation you had with Director 1.

Access is time-limited. The grant expires and you will need to turn it on again — a permission you granted once should not last forever. You can also end it at any time with Turn off.

Why this is a paid feature

Everything else about connecting your own agent costs us nothing: your agent, your subscription, your tokens. Stage Engine is only handing over the capabilities.

Those capabilities are the product, which is why external access is the line that a paid plan buys. The check happens in the app itself, not just in the dialog — turning it on with no plan behind you is refused.