I think I found a bug in the webhook integration event name.
When I have 2 webhooks, one with the event name ‘pushbullet’ and another one with the event name ‘pushbulletjurjen’, it sends a trigger to both this webhooks when using the code:
Particle.publish("pushbulletjurjen", "This is a message!", 60, PRIVATE);
I expected it will only use the webhook with the event name ‘pushbulletjurjen’, so I wonder why it is also send to the ‘pushbullet’ webhook. When I edit and rename the ‘pushbullet’ webhook event name to ‘pushbulletsomethingelse’ it isn’t used anymore. So it looks like the Particle,publish function is fired when the first part matches and is not using the unique name.