Cookie & Privacy Scan
See what a site stores and who it tells before you click "Accept". No signup required.
Prerequisites
- Playwright MCP (comes with Claude Code)
Trigger
- "Cookie/privacy scan https://..."
- "What trackers are on my site?"
- "Am I setting cookies before consent?"
Workflow
- Navigate to the URL using
mcp__playwright__browser_navigate without clicking any
consent banner yet โ this is the pre-consent state.
- Capture pre-consent cookies and storage with
mcp__playwright__browser_evaluate:
() => ({
cookies: document.cookie,
localStorage: Object.keys(localStorage),
sessionStorage: Object.keys(sessionStorage),
})
- Capture network requests with
mcp__playwright__browser_network_requests and flag any
third-party calls to known tracker/analytics/ad domains that fired before consent.
- If a consent banner is present, accept it (
mcp__playwright__browser_click), then re-capture
to compare before/after. Cookie attributes (Secure, HttpOnly, SameSite) come from the
set-cookie response headers in the network log (JS-readable cookies are by definition not HttpOnly).
- Grade:
| Finding |
Severity |
| Tracking cookie / pixel set before consent |
High (GDPR/ePrivacy risk) |
Session cookie missing Secure on HTTPS |
High |
Session cookie missing HttpOnly |
Medium |
Cookie missing SameSite |
Medium |
| Third-party tracker present |
Info (list them) |
- Output:
## Cookie & Privacy Scan: [URL]
**Pre-consent tracking detected โ GDPR risk**
### Before any consent click
- `_ga`, `_fbp` cookies set on load โ analytics/Meta before consent. โ
- Request to `connect.facebook.net` fired pre-consent. โ
### Cookie attributes
| Cookie | Secure | HttpOnly | SameSite | Note |
|------------|--------|----------|----------|------|
| session_id | โ | โ | Lax | Add Secure on HTTPS |
| _ga | โ | โ | none | Tracking; needs consent |
### Third-party trackers (5)
google-analytics.com ยท connect.facebook.net ยท doubleclick.net ยท hotjar.com ยท intercom.io
### Fixes
1. Gate analytics/ad scripts behind consent (don't load them on first paint).
2. Add `Secure` + `SameSite=Lax` to `session_id`.
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