Error 1010 is triggered by Cloudflare's Browser Integrity Check (BIC) feature. The site owner has enabled BIC, which examines HTTP headers — particularly the User-Agent — for known patterns associated with bots, scrapers, and automated tools. If the request's headers match bot signatures or are missing a User-Agent entirely, Cloudflare returns 1010. Legitimate browsers should not trigger this error under normal circumstances.
The HTTP client sending the request has a User-Agent that matches known bot or scraper patterns (e.g., Python-urllib, curl, or custom automation agents).
The request has no User-Agent header at all. Legitimate browsers always include one, so its absence triggers BIC.
Certain privacy extensions or browser configurations strip or alter the User-Agent header in ways that resemble bot traffic.
Access the site using a standard browser (Chrome, Firefox, Safari, Edge) without unusual extensions that modify HTTP headers.
If running a legitimate script or tool, set a realistic User-Agent header in your HTTP requests.
curl -H "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36" https://example.com
If you own the site and need to allow certain automated access, create a WAF exception rule for specific User-Agents or IP ranges, or disable BIC for certain paths.
Access was denied based on the visitor's activity being flagged as malicious by Cloudflare.
The request was blocked by a Cloudflare WAF or firewall rule configured by the site owner.
The site owner has blocked the visitor's IP address using Cloudflare's firewall tools.