You know, there are tons of sites on the internet which check the value of sites, showing traffic details about sites, seo score checker sites, whois checker sites etc..
Also, some of them are 4-5-6 PR; big sites, for example:
www.websitestatz.com/info/example.com
www.websitevalues.net/example.com.html
Are these links are toxic or not? Should we write them to our disavow file?
Or how can I check if a URL is toxic or not?