Sending activity submissions to webhook
This section will describe how to send activity submissions to webhook.
You can configure an activity to call a webhook every time someone completes it. With that, every time your activity is completed, Engage will send the user's submitted answers to the endpoint (webhook) of your choice.

To make it work, you will need:
- the webhook itself,
- authentication credentials, so that Engage can access your webhook.
Supported submission sending methods

Engage webhook caller supports POST and GET methods.
With the POST method the full participant answer, like in the example above, is sent to the webhook.

  "participant_id": "AABB0011",
  "activity": "abcdef",
  "answers": {
    "question1": {
      "answer": "Pizza",
      "answer_value": "item2",
      "question": "Favorite food",
      "question_value": "question1",
      "type": "radiogroup"
    "question2": {
      "answer": 61,
      "answer_value": 61,
      "question": "Age",
      "question_value": "question2",
      "type": "text"
  "url_variables": {
    "visit_id": "qqwweerrtt00998877"
  "response_alerts": [
      "name": "older_than_50",
      "color": "#ff7c87ff"
  "calculated_answers": {
    "square_root_of_age": 7.81
With the GET method only the participant_id is sent to the webhook. Like in the example below:

  "participant_id": "AABB0011",
  "activity": "abcdef"
If there is no authentication method set, then the webhook is called without authentication. In such case only the GET method is allowed and no information is sent in the request.
Webhook error handling

The webhook is called after a participant's response is saved in Engage, therefore participants' answers are safe irrespective of your webhook's failures. Unsuccessful calls are dropped without retry. You can always request participants' submissions from our API. Read more.
Our team is ready to provide you assistance in any of the steps and will gladly guide you through the process.

Do not hesitate to contact us via support@longenesis.com if you have any questions or any help is required.
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