Harvest is the time tracking software.
For your Harvest account, YAP supports the following actions:
Create timesheet entry
Before setup, check that you have granted to YAP the permission to send notification to your Harvest account. For this, sign in to Harvest and authorize the permissions requested by YAP.
The V2 API requires an access token to authenticate requests. Two options are available for you:
A Personal Access Token which is tied directly to you and is the quickest way to start playing around with the API.
Implementing a full OAuth2 Authentication flow which allows other people to use your Harvest integrations.
If you need dive deeper, take a look at Authentication.