DocuPost
docupost.comDocuPost's Send Letter API submits a letter document and mailing details for physical delivery through U.S. mail.
What your agent can do
Use the Send Letter API to programmatically send letters via U.S. mail through DocuPost.
Via API.
Tasks depend on the interface and permissions.
Connection methods
Choose a route that fits your agent.
API
For custom integrations
View paths for APIAPI connection
API path
https://app.docupost.com/api/1.1/wf/sendletter