In this post I briefly explain about new Teams calling API (currently, in beta) with Microsoft Graph for your beginning.
Trusted Application API (Skype for Business) – Authentication and Online Meetings
Here I show you what is and how to use the Trusted Application API in Skype for Business development platform with HTTP Flow and simple programming samples. (In this post, we focus on the authentication and handling the ad-hoc meetings.)
Build Bot with Voice (Skype)
With Skype, you can build calling (voice) bot using Microsoft Bot Framework. This post shows you the essence of this voice communication bot.
Build BOT working with Authentication (Microsoft Bot Framework)
In this post, I show you how to build and design the bot with the authentication process (integrating Office 365, Azure, etc), like “FreeBusy” bot or “AzureBot”.
Rich messages with Bot Service (Rich text, Image, Card, etc)
This post shows the various rich and functional messages (how-to) using Microsoft Bot Framework.
BUILD BOT with Bot Framework Rest Api (Azure Bot Service)
This blog post explains how to build your Bot (incl. Skype Bot) without SDK (using only HTTP). This shows how to provide and consume authorization info and rest (webhook) in Microsoft Bot Framework for any programming languages.
Note that the Skype bot development has moved to the Microsoft Bot Framework 3, and please use this.
Build Your Skype Bot with OAuth and REST
This blog post explains how to build your Skype Bot without SDK (using only HTTP). This shows how to provide and consume Authorization header, and how to call and receive the rest (webhook).