https://docs.google.com/document/d/1vH2y5iXy67UYL68-gRL_qZI_ShpZFhmgKwlb1NR2Yvg/edit?usp=sharing

The VoIP API is an extension of our billing and user API. This allows you to: manage, order, and route DIDs; update DID CNAM and e911; create, update, and view LNPs (Port-ins); and various other functions.

A full description is available in the document. Please click the link as it is regularly updated to reflect client requests for API functions.