Prevent webhooks being triggered multiple times by mistake

In my family we’ve started using nfc tags that triggers automations using webhooks (GET request). However, I’ve noticed that the webpage that is being opened can be opened several times by misstake. It seems to be reloaded everytime the user is opening the browser in the future. This webpage is also white with no text, so it is not possible to send a message to the user “please close this webpage”. Is there a solution to this problem?