https://developers.line.biz/en/docs/messaging-api/overview/
Messaging API overview | LINE Developers
Use the Messaging API to build bots to provide personalized experiences on LINE to your users. With the Messaging API, a bot server can send and receive data...
messaging api overviewlinedevelopers
https://platform.text.com/docs/messaging/
Messaging API Overview | Text Platform Docs & API Reference
Using APIs is much easier if you know the basics. Read more about concepts like chat, thread, and routing, which are essential to understand Messaging API.
messaging api overviewplatform docstextreference