assign item to project
Ability to assign items to a project is currently missing in the API, which makes Projects API totally useless to us.
Mark Spencer commented
Because the Xero APIs do not currently allow us to post bill or invoice line items to Projects then our staff are having to do this manually. The rest of the process is automated but this last step requires human intervention.
It doesn't make sense to be able to associate line items to a Project at the user interface but not through the API. This devalues our workflow automations and frustrates the heck out of our staff!