In order to connect Knackly to Zapier you will first need to click on the following link to give your Zapier account access to Knackly.
https://zapier.com/developer/public-invite/99482/d629bb5a0a6b96c62259fb4e3e3cf11c/
Then in Knackly go to the API Keys menu and create a new API. You will use that key in Zapier to connect to Knackly.