Was looking at https://forums.backpack.tf/index.php?/topic/50834-api-to-remove-listings/
Just to recap on fiskie's response a year ago:
GET /api/classifieds/v1/_search (same parameters as regular classifieds web client search) //https://backpack.tf/api/docs/classifieds_search
POST /api/classifieds/v1/_pulse (supersedes the Automatic heartbeat, lets everyone know you're "alive", bumps all listings, etc) //We still have to do this with heartbeat https://backpack.tf/api/docs/a
var data = JSON.stringify({listing_ids : ['440_5126438655','440_5989064097']});
request.delete('https://backpack.tf/api/classifieds/delete/v1?token=MYTOKENUSEUROWN',{
headers : {"Content-Type": "application/json"},
body : data
},function(err,response,body){
if(err)
console.log(err);
else{
var data = JSON.parse(response.body);
console.log(data);
}
})