Guide · Windsurf
Add VibeFix to Windsurf in 1 minute
To add VibeFix to Windsurf, open the ... menu at the top right of the Cascade panel, choose Open MCP config file, and add VibeFix under mcpServers with "serverUrl": "https://vibe-fixer.com/mcp". Windsurf's editor is now called Devin Desktop, and the steps are the same.
Steps
- In the Cascade panel, open the ... (Actions) menu at the top right.
- In the MCPs section, press Open MCP config file.
- Add VibeFix inside
mcpServers. In an empty file, the whole file is:{"mcpServers": {"vibefix": {"serverUrl": "https://vibe-fixer.com/mcp"}}} - Save the file and refresh the MCP list in Cascade. Sign in to VibeFix if it asks.
The file is %APPDATA%\devin\mcp_config.json on Windows and ~/.config/devin/mcp_config.json on macOS and Linux. Team and Enterprise admins can limit which MCP servers are allowed.
What to ask in Cascade
- "Use VibeFix: my login page shows a blank screen after I sign in. What is the likely cause?"
- "Use VibeFix to check my app at https://your-app.com like a brand-new user."
Asking what is wrong, and getting the link to a free check, works without signing in. Starting a check from the chat needs the VibeFix sign-in.
What the check gives you
An AI agent opens your published app as a brand-new person, signs up with a real inbox and uses the app on a phone and a computer. The free check shows how many problems a new user would hit, plus one screenshot. The full details and the fix prompt for every problem, plus 3 re-checks, are $9 for that app. VibeFix only checks; it never changes your app.
Only check an app that is yours.
Source: Cascade MCP integration
VibeFix is independent. Windsurf and Devin are trademarks of their owners, named here only to show where VibeFix can be added.
Setup steps from Windsurf's official docs.
Still stuck?
Paste your app’s link for a free sign-up check, no account needed. An AI agent signs up to your live app as a brand-new person, on a phone and a computer, and tells you whether a new person can finish.