Manual Form.io API

form.html

<div ng-controller="FormSubmissionController">
  <formio form="form"></formio>
</div>

FormSubmissionController.js

angular.module('myApp')
  .controller('FormSubmissionController', [
    'Formio',
    '$http',
    function(Formio, $http) {
      $scope.form = null;
      
      // Render the form manually. This will not call the Form.io API when it is submitted, but rather
      // just trigger the formSubmission event.
      (new Formio('https://myproject.form.io/myform')).loadForm().then(function(form) {
        $scope.form = form;
      });
      
      // Handle the submission.
      $scope.$on('formSubmission', function(event, submission) {
        
        // This will now send the submission to your API. You can also modify it before it is sent here.
        $http.post('https://api.yourdomain.com/resource', submission);
      });
    }
  ]);