# dalfox > A powerful open-source XSS scanner focused on automation. > More information: . - Scan a single URL for XSS vulnerabilities: `dalfox url {{http://example.com}}` - Scan a URL using a header for authentication: `dalfox url {{http://example.com}} -H {{'X-My-Header: 123'}}` - Scan a list of URLs from a file: `dalfox file {{path/to/file}}`