Is there a way to activate custom events using this API?

[jfantell]

Is there a way to activate custom events in API.ai using this API?

[Nordes]

I'd say that the best is to trigger your event by yourself. It's basically a call to API.AI ( I did it for the welcome message when someone join the conversation ).

See doc at : https://dialogflow.com/docs/reference/agent/query If you need an example I can give one later.