Unknown URLs

Detect URLs not in your approved domain list.

The Unknown URLs detector identifies links and images that reference domains outside your approved list. By default, it allows the top 10,000 most popular domains to reduce false positives.

Recommended for Output

Use cases

  • Detect hallucinated URLs in LLM responses
  • Block phishing or malicious links
  • Ensure only approved documentation links are shared

Labels

UNKNOWN_URL

Found a URL pointing to an unknown domain.

UNKNOWN_IMAGE

Found an image referencing an unknown domain.

Configuration

Allowed domains

List of allowed domains (e.g., example.com, myapp.io). Subdomains are automatically allowed.

Allow popular domains default: enabled

Allow the top 10,000 most popular domains (from Cloudflare Radar).

Roles default: assistant

Which message roles to analyze.