For the Whatsapp/Instagram pay-per-message API use this documentation:
For Skype pay-per-minute calls API use this documentation:
ChargeDM Technologies is not endosers nor affiliate with Whatsapp Inc. ChargeDM logo is a registered mark.
We are not using any Whatsapp APIs, we do not access any Whatsapp servers, we do not do any reverse enginering to Whatsapp protocol to create our own proprietary platform to charge per message on Whatsapp or other apps.
Copyright 2019 @ ChargeDM Technologies LTD. All rights reserved.