{"slug": "can-we-play-a-game-on-pixelden-made-my-pixel-art-game-portal-playable-inside-via", "title": "Can we play a game on pixelden? Made my pixel art game portal playable inside Claude via MCP", "summary": "A developer hacked together a playable pixel art game inside Claude using the MCP UI extension, which renders a live HTML iframe in the conversation. The game runs a one-button arcade loop in the iframe, and on crash, the widget sends the seed and jump ticks to the server for score computation, keeping the model away from the numbers.", "body_md": "I hacked the new MCP UI extension 😎\n\nBy which I mean I read the spec and used it exactly as documented, for a dumb little game. 😅\n\nMCP Apps is the official MCP UI extension. Short version: your server declares an HTML resource under ui://, links it to a tool via _meta.ui.resourceUri, and the host renders that HTML in a sandboxed iframe right in the conversation. The iframe talks back over JSON-RPC, so it can call tools. Not a rendered screenshot, a live UI.\n\nEveryone is shipping dashboards and forms with it. I put a game loop in there.\n\nThe tool starts a run, the iframe is a real one button arcade game. When you crash, the widget sends the seed and the ticks you jumped at back to the server, the server replays them through the engine and computes the score. The model never touches the number.", "url": "https://wpnews.pro/news/can-we-play-a-game-on-pixelden-made-my-pixel-art-game-portal-playable-inside-via", "canonical_source": "https://dev.to/freema/can-we-play-a-game-on-pixelden-made-my-pixel-art-game-portal-playable-inside-claude-via-mcp-h4m", "published_at": "2026-07-30 20:01:58+00:00", "updated_at": "2026-07-30 20:34:29.804601+00:00", "lang": "en", "topics": ["developer-tools", "artificial-intelligence"], "entities": ["Claude", "MCP"], "alternates": {"html": "https://wpnews.pro/news/can-we-play-a-game-on-pixelden-made-my-pixel-art-game-portal-playable-inside-via", "markdown": "https://wpnews.pro/news/can-we-play-a-game-on-pixelden-made-my-pixel-art-game-portal-playable-inside-via.md", "text": "https://wpnews.pro/news/can-we-play-a-game-on-pixelden-made-my-pixel-art-game-portal-playable-inside-via.txt", "jsonld": "https://wpnews.pro/news/can-we-play-a-game-on-pixelden-made-my-pixel-art-game-portal-playable-inside-via.jsonld"}}