Let Claude check your live app like a new user

Your app works for you. You're signed in, your customers aren't. The first screen a brand-new customer hits is the one you never see.

VibeFix now works inside Claude. The same server can be added to Cursor and Codex too; their setup is below, but we haven't finished a test run in those two yet. When your app breaks, ask your AI tool to check the live app. It calls VibeFix, and our AI agent signs up like a new user and shows you, with a screenshot, whether your app breaks for them. It only checks your own app, and only when you say yes.

Here is the setup for each tool.

Claude Code

Connect the server:

claude mcp add --transport http vibefix https://vibe-fixer.com/mcp

Or install the server and the skill together as a plugin:

claude plugin marketplace add yos88da/vibefix-mcp && claude plugin install vibefix@vibefix

Claude (desktop and web)

Go to Customize, Connectors, press +, then Add custom connector. Paste https://vibe-fixer.com/mcp and press Add. VibeFix is also listed in Claude's connector directory.

Cursor

Add the server to ~/.cursor/mcp.json:

{ "mcpServers": { "vibefix": { "url": "https://vibe-fixer.com/mcp" } } }

Then add the project rule that tells Cursor when to call it:

curl -fsSL https://raw.githubusercontent.com/yos88da/vibefix-mcp/main/agent-rules/cursor/vibefix.mdc --create-dirs -o .cursor/rules/vibefix.mdc

Codex

codex mcp add vibefix --url https://vibe-fixer.com/mcp
codex mcp login vibefix

And the AGENTS.md section that tells Codex when to call it:

curl -fsSL https://raw.githubusercontent.com/yos88da/vibefix-mcp/main/agent-rules/AGENTS.md >> AGENTS.md

Any agent that takes skills

npx skills add yos88da/vibefix-mcp

What to ask

"Check my live app at https://example.com like a brand-new user."

The skill also tells your agent to offer a check when you say your deployed app is broken, when new users can't sign up or log in, or right after you publish a sign-up, log-in or payment change.

Try it

App broke after you published it? Our AI agent fixes it in your code, then tests your live app again so you see the result yourself. The first check is free. vibe-fixer.com/tools

Which tool do you build with, and would you let it test your live app the way a stranger would?

Claude, Cursor and Codex are trademarks of their owners. VibeFix is independent and is not affiliated with or endorsed by them.

I'm building VibeFix.