Inkit has partnered with Leanplum, the leader in helping mobile teams orchestrate multi-channel campaigns. From messaging to the in-app experience and now direct mail, Leanplum does it all from a single mobile marketing platform. With this integration, Leanplum enables Inkit to seamlessly send direct mailers to your users. The Inkit webhook can be built as long as you have a pre-existing Leanplum account set up.
If you'd like to send Postcards, use the following guide: Inkit Postcards API.
If you'd like to send Letters, use the following guide: Inkit Letters API.