The CAPTCHA Monitoring project
aims to track how often Cloudflare fronted
websites return CAPTCHAs to Tor clients.
The project aims to achieve this by fetching
webpages via both Tor and other mainstream
web browsers and comparing the results.
The tests are repeated periodically to find
the patterns over time.
Collected metadata, metrics, and results are analyzed and displayed here to understand how Cloudflare manipulates internet traffic and affects people's access to the internet. Please visit the project website for more detailed information.
You can use the measurement search at /measurements to see individual measurements and more data. If you prefer to access the raw data, you can use the API at api.captcha.wtf