Error: 404: Discovery document not found for API service

[agersoncgps]

I am just testing with debug on and:

 google.build(function(api) {
        for(var k in api){
            console.log(k);
        }
    });

Getting this error:

Error: 404: Discovery document not found for API service: pubsub.googleapis.com format: rest version: v1beta2?fields=name,baseUrl, resources//methods//path, resources//methods//httpMethod