Summer Engine is answering right now. Last checked 7 min ago. 4 618 installs a week from npm. Last commit 25 Oct 2026.
The game engine built for AI. Any agent makes a multiplayer game and publishes it.
What the code does
We read the source, 3 h ago · rules 995398eba69f
Things with no honest explanation: a promise that contradicts the code, code that runs at install time while hiding what it does, data leaving the machine.
exec(`rm -rf "${staged}"`);
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
parts.push(`[s${parts.length}]trim=start=${r0.toFixed(3)}:end=${r1.toFixed(3)},setpts=(PTS-STARTPTS)*${factor.toFixed(5)},fps=${FPS},scale=540:960:force_original_aspect_ratio=decrease,pad=540:960:(ow-iw)/2:(oh-ih)/2,setsar=1,trim=end_frame=${n}[r${i}]`);
const child = spawn(command, args, { cwd: options.cwd, env: options.env ?? process.env, stdio: ["ignore", "pipe", "pipe"] });
Array.isArray(current) ? `an array of ${current.length} items — select one with json_path, e.g. [0]` : `a ${describeJsonType(current)}`
r = subprocess.run(S + args + ["--json"] + (["--input", json.dumps(inp)] if inp else []), capture_output=True, text=True)
out = os.path.join(outdir, f"tile_{i}_paint.png")
for (const entry of (await readdir(current, { withFileTypes: true })).sort((a, b) => a.name.localeCompare(b.name))) {
for (const [key, value] of Object.entries(process.env)) {
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
We found things in this code
Code changes quietly between releases, and nobody reads the diff of a dependency. We do, on every release — watch Summer Engine and you get told the day something new turns up.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 7 min ago.
claude mcp add summer --transport http https://mcp.summerengine.com/mcphttps://mcp.summerengine.com/mcp[mcp_servers.summer]
url = "https://mcp.summerengine.com/mcp"{
"mcpServers": {
"summer": {
"url": "https://mcp.summerengine.com/mcp"
}
}
}{
"servers": {
"summer": {
"type": "http",
"url": "https://mcp.summerengine.com/mcp"
}
}
}This endpoint answered with an authorization challenge. The server is running, and it signs you in through your browser: there is no API key to paste.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://mcp.summerengine.com/mcp | streamable-http | sign-in | 184 ms | 7 min ago |
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Summer Engine — questions
Answers built from our own checks of this server.