Inkit has partnered with Zapier, the leaders in allowing businesses to easily connect and automate the apps they use. Use Inkit and Zapier to sync your online apps with third-party tools and vendors. The Inkit webhook can be built as long as you have a pre-existing Zapier 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.