Add UI to MCP Server Enrich an existing MCP server's tools with interactive UIs using the MCP Apps SDK ( ). How It Works Existing tools get paired with HTML resources that render inline in the host's conversation. The tool continues to work for text-only clients — UI is an enhancement, not a replacement. Each tool that benefits from UI gets linked to a resource via , and the host renders that resource in a sandboxed iframe when the tool is called. Getting Reference Code Clone the SDK repository for working examples and API documentation: API Reference (Source Files) Read JSDoc documentation d…