Get started with MCP Apps changedconnectors/building/mcp-apps/getting-started
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99> [!NOTE]
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11> If you haven't built the server yet, see [Build an MCP server for Claude](/docs/connectors/building/index).
11> If you haven't built the server yet, see [Build an MCP server for Claude](/docs/connectors/building/index.md).
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1313To see how an MCP App looks and behaves, [try an example in Claude Desktop](#try-an-example-mcp-app-in-claude-desktop) first, then [build your own](#build-your-own-mcp-app) from the SDK quickstart, the examples, or the agent skills.
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100100To add an MCP App to your own MCP server, start from the SDK documentation and examples:
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102* [Add an interactive UI to your MCP server](/docs/connectors/building/mcp-apps/quickstart): add a one-tool MCP App to the quickstart server on this site, in plain JavaScript with no build step
102* [Add an interactive UI to your MCP server](/docs/connectors/building/mcp-apps/quickstart.md): add a one-tool MCP App to the quickstart server on this site, in plain JavaScript with no build step
103103* [MCP Apps Quickstart](https://modelcontextprotocol.github.io/ext-apps/api/documents/Quickstart.html): step-by-step guide to building your first MCP App
104104* [SDK API documentation](https://modelcontextprotocol.github.io/ext-apps/api/index.html): full API reference
105105* [Example implementations](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples): vanilla JS, React, Vue, Svelte, and more
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126126c3d80a4ed901ee05b21755a88273b4a4.claudemcpcontent.com
127127```
128128
129If Claude reports `Invalid ui.domain format` or `ui.domain mismatch`, see [Troubleshoot MCP Apps](/docs/connectors/building/mcp-apps/troubleshooting#ui-domain-validation-fails).
129If Claude reports `Invalid ui.domain format` or `ui.domain mismatch`, see [Troubleshoot MCP Apps](/docs/connectors/building/mcp-apps/troubleshooting.md#ui-domain-validation-fails).
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131131### Build with an AI coding agent
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150150## Next steps
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152* [Design guidelines](/docs/connectors/building/mcp-apps/design-guidelines): display modes, mobile layout, and style variables for an app that feels native to Claude
153* [Troubleshoot MCP Apps](/docs/connectors/building/mcp-apps/troubleshooting): developer tools and fixes for an app that doesn't render
154* [Submit a connector](/docs/connectors/building/submission): list your server and its MCP App screenshots in the directory
152* [Design guidelines](/docs/connectors/building/mcp-apps/design-guidelines.md): display modes, mobile layout, and style variables for an app that feels native to Claude
153* [Troubleshoot MCP Apps](/docs/connectors/building/mcp-apps/troubleshooting.md): developer tools and fixes for an app that doesn't render
154* [Submit a connector](/docs/connectors/building/submission.md): list your server and its MCP App screenshots in the directory
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