The REST API documentation is at Home | Adobe Developer Connection. When you are ready to request the report, one thing to keep in mind is that the pageurl is a data warehouse dimension, so be sure to add "source":"warehouse" to the request:
{
"reportDescription":{
"reportSuiteID":"INSERT-RSID-HERE",
"dateFrom":"2017-11-01",
"dateTo":"2017-11-07",
"elements":[
{
"id":"pageurl"
}
],
"source":"warehouse"
}
}