Usando SOAP

gistfile1.php

// app/config/databases.php

class DATABASE_CONFIG {
  var $default = array(...);
  var $soap = array('datasource' => 'Datasources.Soap', ...);
  var $test = array(...);
}


// app/models/servico.php

class Servico extends AppModel {
  var $useDbConfig = 'soap';
  var $useTable = false;
}


// app/controllers/usuarios.php

class UsuariosController extends AppController {
  var $uses = array('Servico');

  function index() {
    $this->set('usuarios', $this->Servico->get_usuarios());
  }
}