The FollowUpBoss PHP Sample Code by Follow Up Boss demonstrates API interaction. It presents how to send a general buyer and seller inquiries and how to send a lead registration.
Last year, Facebook announced that it would launch a set of business-centric tools around WhatsApp. The company has also long stated that it would eventually monetize its various messaging platforms. Facebook has taken a step towards both goals with the introduction of the WhatsApp Business API.
Google has announced the release of the Google My Business API version 4.2 containing new endpoints that will let third-party partners create end-to-end onboarding experiences for their merchants on their own platforms. Google My Business offers merchants the ability to create business listings.