2nd1st/open-mcp-apps

MCP Apps engine for persistent, reusable UI. The AI writes a single-file HTML app — todo board, habit tracker, dashboard, reading list — against a small `window.oma` API, saves it to a registry, and reopens it by name in any later chat. Data lives in generic collections backed by SQLite plus an append-only change ledger, so it outlives the conversation and the AI and the human edit the same store; every mutation is an idempotent command with optimistic concurrency. Ships a 22-app App Store with live previews and one-click install. 33 tools. Transport: stdio. Auth: none (runs locally). Registers into Claude Desktop, Claude Code, and Codex; apps render in any MCP Apps-capable host (claude.ai, Claude Desktop, Codex, ChatGPT). Requires Node 22+. Install: `npx -y @2nd1st/open-mcp-apps`. License: MIT. Hosted version at https://openmcp.app.

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