Add an interactive UI to your MCP server changedconnectors/building/mcp-apps/quickstart
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317317## Next steps
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319* [What an MCP App can do in Claude](https://claude.com/docs/connectors/building/mcp-apps/getting-started.md#what-an-mcp-app-can-do-in-claude): show the UI in the side panel or full screen, let Claude call tools in it, and more
319320* [Design guidelines](https://claude.com/docs/connectors/building/mcp-apps/design-guidelines.md): choose a display mode and use Claude's style variables so the UI looks native in the conversation
320321* [Set `ui.domain` for Claude](https://claude.com/docs/connectors/building/mcp-apps/getting-started#set-ui-domain-for-claude): give the UI a stable sandbox origin, which it needs if it runs its own OAuth flow
321322* [Troubleshoot MCP Apps](https://claude.com/docs/connectors/building/mcp-apps/troubleshooting.md): open developer tools in Claude and fix a UI that doesn't appear
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