Build for Fifth Door

Build a game with your own editor and coding agent, publish it to Fifth Door with the MCP server, and optionally add platform features with the Platform SDK.

Guides

• Publish from your editor: install the Fifth Door MCP server in Cursor, Claude Code, Codex or VS Code, sign in, and publish a game from your project.
• Platform SDK: add identity, saved progress, shared records, multiplayer, in-game LLM calls, daily puzzles and notifications to a game.
• Partner API: create and iterate games over REST from a hosted agent.
• IDE extension: play Fifth Door games in a Cursor or VS Code panel while a coding agent runs.