Cookie Banner Symmetry Check

Status: coming soon. The check is built and tested on test pages only. It is not open for use, published on Apify or for sale yet, and no price is set.

Technical evidence of observed behavior on the date tested. Not legal advice and not a certification of compliance.

A cookie banner asks a visitor to choose. This check records how hard each choice is and what the page does when the visitor chooses, or closes the banner without choosing.

What it measures

  • Clicks to accept and to reject, and the path the checker took for each.
  • Closing without choosing: whether new observed third-party requests, cookies from third-party requests or consent grants follow.
  • Persistence: whether the banner comes back after a choice and a reload.
  • The banner's platform (it recognises nine, among them OneTrust, Cookiebot, Usercentrics, Didomi and Osano, plus a generic pattern) and whether it could operate the banner at all. When it cannot, it says "couldn't operate banner" and does not guess.
  • Screenshots of every step, which every result refers to.

Button size, contrast and order on the page are planned and are not measured yet. When they are, a size comparison will be a labelled heuristic that can be wrong, so the screenshots will always be shown beside it.

The wording is always: evidence of interface behavior, not a legal determination.

What it cannot tell you

  • One page, one visit, one place, one browser setting, on the date shown. Banners differ by country, device and visit.
  • It does not say what any law or regulator requires, and it does not name a site as breaking a rule.
  • Detection of banners on real sites has not been measured. Everything tested so far was tested on pages written by the same people who wrote the checks.

How you will be able to use it

  • Free, one page: the free checker, not open yet.
  • Many pages: an Apify Actor, in development. Apify listing: coming soon
  • Monitoring over time: not built; see the waitlist.

You confirm that you own a site or are authorized to test it before any scan.

How it identifies itself

When this product loads a page it sends a Chrome-style user agent that ends with AgentHarborEvidenceBot/1.0 (+https://agentharbor.agency/bot), honours robots.txt (rules for either AgentHarborEvidenceBot or AgentHarbor-ComplianceSignals are honoured), keeps to per-site rate limits and does not log in, solve CAPTCHAs or get around bot protection. How to opt a site out: our scanner's page.

Waitlist

Paid monitoring and the paid plans for this product do not exist yet, and nothing is for sale. If you want to hear when it opens, e-mail brian@agentharbor.agency with the subject "Waitlist: Cookie Banner Symmetry Check". We use your address only to tell you about this product and delete it if you ask.

Read the privacy page and the support page.

How this was made: the text and the code behind this product were drafted with an AI assistant (Claude, by Anthropic), then reviewed, tested and run by Agent Harbor LLC.