ext-apps

Skybridge is a full-stack TypeScript framework for MCP Apps and ChatGPT Apps. Type-safe. React-powered. Platform-agnostic.

Two-mode MCP music studio: scored composition (ABC notation) and live performance (Strudel). Interactive ext-apps UI with sheet music rendering, 30+ instruments, style presets, and live coding REPL.

Self-hosted platform for MCP Apps and agent automations — tools, interactive UIs, scheduled runs, multi-agent delegation.

MCP server for the temperature & weather for beautiful Aare

Agent-aware app SDK for the MCP ext-apps protocol. Typed tool calls, reactive data sync, and React hooks — works in any ext-apps host.

Interactive micro-tools for humans and AI agents — a reference implementation of MCP Apps (SEP-1865) UI cards over Streamable HTTP MCP.

Why your MCP App renders blank: checks a remote MCP server's ui:// views (tool link, MIME type, CSP, the ui/initialize bridge, ui.domain) for Claude, ChatGPT and any MCP Apps host, plus ChatGPT's directory review, says whose it is and the fix, and previews the view sandboxed.