Routing with API possible?

[WEBudoGT]

On project's description says it's possible to route using external HTTP API, but Routing wiki doesn't mention the "httpr" found on Routing Table object when creating one on the GUI:

{
"name": "routing_table_name",
"desc": "description",
"action": "route/block/query/httpr",
"variables": [
"cidnumber",
"cidname",
"dstnumber",
"intconname",
"realm"
],
"routes": {
"primary": "primary_endpoint",
"secondary": "secondary_endpoint",
"load": 100
}
}

How does this work? Where do I define the API endpoint to be called on routing?

[hnimminh]

You define http endpoint as an routes.primary

[WEBudoGT]

What does the API has to return?

[hnimminh]

API should return string array of interconnection name