Sekai for people who build with AI
Sekai MCP: make a game with your AI.
Connect Codex, Claude Code or Cursor to Sekai MCP, the official Model Context Protocol server for Sekai. Ask your AI coding assistant to build you a game. It uses Sekai's own library of art, music and sound, and puts the finished game straight into your Sekai drafts — you open it in the app and publish when you're happy with it.
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Sekai MCP setup guide for Codex and Claude Code
Connect your AI assistant
Pick yours. It takes one line, then one sign-in in your browser.
Run this in your Terminal — not inside Claude Code. --scope user is what makes Sekai available in
every folder, not just this one.
claude mcp add --scope user --transport http sekai https://mcp.sekai.ai/mcpThen start Claude Code, type /mcp, pick sekai and choose Authenticate. Sekai opens in your browser: sign in with the Sekai account you already play with, and approve it.
Same two steps if Sekai ever asks you to reconnect: /mcp → sekai → Authenticate.
No terminal needed. In the Claude app or claude.ai: Settings → Connectors → Add custom connector, name it sekai, paste this address, then press Connect. Sekai opens in your browser: sign in with the Sekai account you already play with, and approve it.
https://mcp.sekai.ai/mcpTo reconnect later, open the same screen, disconnect sekai and connect it again.
In Cursor, open Settings → Customize → MCP (or the command palette, "Open MCPs") and add a server called
sekai with this address. Cursor writes it to ~/.cursor/mcp.json. Sekai opens in your browser: sign in with the Sekai account you already play with, and approve it.
https://mcp.sekai.ai/mcpPrefer the file? Put {"mcpServers": {"sekai": {"url": "https://mcp.sekai.ai/mcp"}}} in
~/.cursor/mcp.json and restart Cursor.
Two commands in your Terminal: the first adds Sekai, the second signs you in. If a browser does not open automatically, open the authorization link shown in the terminal.
codex mcp add sekai --url https://mcp.sekai.ai/mcp
codex mcp login sekaiSekai opens in your browser: sign in with the Sekai account you already play with, and approve it.
In the ChatGPT desktop app instead: Settings → MCP servers → Add server, type Streamable HTTP, this address, save, restart, then click Authenticate. Same account either way.
Sekai works with any assistant that speaks MCP over streamable HTTP and can sign in through your browser. Give it this address — there is no API key to paste, and an assistant that only takes a fixed key cannot connect.
https://mcp.sekai.ai/mcpKnown commands: Gemini CLI gemini mcp add --transport http -s user sekai https://mcp.sekai.ai/mcp ·
Amp amp mcp add sekai https://mcp.sekai.ai/mcp · OpenCode opencode mcp add then
opencode mcp auth sekai. Windsurf, VS Code, Zed, Kiro, Goose and Warp all take the address in their own MCP
settings. Most of them open the browser the first time the assistant actually uses Sekai, not when you add it.
Then try: "Make me a one-tap game about a cat catching fish and put it in my Sekai drafts."
How it works
- 1Pick your assistant
Paste the one line above into Claude Code, Cursor, Codex or any assistant that speaks MCP.
- 2Approve it in your browser
A tab opens: sign in with the Sekai account you already play with, and allow it. It can only do what you allow, and you can disconnect it any time.
- 3Ask for a game
"Make me a rhythm game about cats." Your assistant builds it and sends it to Sekai for you.
- 4Publish it when you like it
It lands in your drafts, where only you can see it. Play it, ask for changes, and publish from the Sekai app when it's ready.
What your assistant gets
Thousands of images, music tracks, sound effects, 3D models and fonts, ready to drop into a game.
It uploads the game it built straight into your drafts — no files to move, no forms to fill.
Everything a game needs to run well on phones and inside the Sekai app, written for the assistant to follow.
Uploaded, importing, ready to play — or what to fix if a game didn't pass Sekai's check.
Your account stays yours
Your assistant acts as you, only for what you approve on the sign-in screen, and only while you keep it connected. Your games, likes and followers live on Sekai exactly as they always have. Creation conversations are stored privately under the session collection policy shown during setup.