Free tool
Is your browser agent detectable?
Most detection tests read what a browser claims to be. This one reads what your tool does with it: whether text arrives as keystrokes, whether a click covers the distance to its target, and whether two attempts move the same way.
This page measures whether a browser automation tool leaves traces a website can read. It does not measure the browser, it measures what the tool does: whether text arrives as keystrokes, whether a click has an approach, whether two runs move the same way.
To use it, point your agent at this address and let it work through the task below. Playwright, Puppeteer, Selenium, a browser MCP server or your own script all work. Nothing needs to be installed here, and no account is required.
You can also do the task yourself. That run is worth having: it is the control that shows the measurement does not simply flag everyone.