How do I make Claude Code check my website after a deploy?

Updated 2026-10-17

Short answer: give Claude Code the Preventionlabs MCP server, and ask it to check your live site after a deploy.

Claude Code works from code. It can't see what visitors see: the broken page, the failed redirect, the certificate warning. A build can pass while the live site is broken.

How to check it yourself

  1. The site loads on every version of its address: with and without www, http and https.
  2. The pages you changed answer 200, not 404 or 500.
  3. No new JavaScript errors in the browser console.
  4. HTTPS still works, and email records (SPF, DKIM, DMARC) are still in place.
  5. No files left public, like .env, backups or the .git folder.

Set it up

  1. Create your account, add your site and prove it's yours.
  2. Open Connections → AI agents and create your API key.
  3. Run this once in your terminal:
    claude mcp add -s user preventionlabs -e PREVENTIONLABS_API_KEY=plk_your_key -- npx -y preventionlabs-mcp
    Restart Claude Code.

What Preventionlabs shows

Ask Claude Code to check your site with Preventionlabs. The report lands in your session: problems first, each with the evidence and what to do. After a fix, run a second report: it shows whether the problem is gone. If the report is clean, the problem isn't on the outside.

Each website gets 2 reports a day. Your agent can reread the last report any time without using one.

See how the MCP server works.

Price

First report free, no card needed. Then A$50 a month, up to 10 domains.

Run your first report free

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