Re: REST API url filter
You have full access to the object database via API, so the webfilter being just one of them should be configurable too. API reference lists few examples (firewall objects creation), but by the same template you may try to lab it.
POST /api/v2/cmdb/firewall/address -> POST /api/v2/cmdb/webfilter/profile ...
I don't have ready example to show, if you don't find one till the weekend , I 'll try to post some.