Used to add a tag or update an attribute when an event occurs or an attribute changes outside your app, for example "balance.updated", "user.balance", etc.

For more information on attributes and tags review our dedicated guide.


Set a user's first name attribute:

curl --request POST \
  --url \
  --header 'content-type: application/json' \
  --data '{
    "apptoken": "YOUR_APPTOKEN",
    "device_id": "20",
    "tag": "user.first_name",
    "value": "Sam"
Click Try It! to start a request and see the response here!