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Troubleshoot MCP Appsconnectors/building/mcp-apps/troubleshooting

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First seen 14 Aug 2026 09:20 UTC

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25 Sep 26 Troubleshoot MCP Apps ±changed +2−2 25 Sep 26 Troubleshoot MCP Apps ±changed +45−41 25 Sep 26 Troubleshoot MCP Apps ±changed +55−31 14 Aug 26 Troubleshoot MCP Apps ·first recorded +109−0

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Categoryconnectors
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# Troubleshoot MCP Apps
## Open developer tools
### Claude Desktop
## Fix common problems
### Tool call appears but the app is invisible
#### Missing `app.connect()` call
#### Iframe has zero height
### App doesn't render when tool results are large
### Assets or API requests fail only on iOS
### `ui.domain` validation fails
## Next steps
# Troubleshooting MCP Apps