Deutsche Telekom Developer Center
Communication APIs
Integrate sms, voice, video and two-factor authentication into your apps with Vonage communication APIs. Build complex conversational flows with a user friendly drag-and-drop interface in Vonage AI Studio.
Add an extra layer of security when users perform sensitive tasks by confirming their identities.
![Two factor authentication](https://a.storyblok.com/f/270183/11231x4000/a5a9606e7d/two-factor-authentication.png/m/)
Generate a 1-to-1 video appointment workflow. This can be used for a doctor-patient, student-teacher, or any other 1-to-1 web scheduling application.
![1-to-1 Video Chats](https://a.storyblok.com/f/270183/1280x456/935e6f56bd/video-chats.png/m/)
Build an automated phone system for users to input information with the keypad and hear a spoken response
![Interactive Voice Response](https://a.storyblok.com/f/270183/1280x456/f0822973e5/interactive-voice-response.png/m/)
Facilitate SMS communication between two parties without revealing either one's real phone number to the other.
![Private SMS Communication](https://a.storyblok.com/f/270183/1280x456/3271cd3f22/private-sms-communication.png/m/)
Build an automated phone system for users to input information with the keypad and hear a spoken response
![Interactive Voice Response](https://a.storyblok.com/f/270183/1280x456/f0822973e5/interactive-voice-response.png/m/)
Replace your toll-free numbers (e.g. 800, 0800) with local geo numbers for cheaper local calls and location-sensitive information.
![Local Numbers](https://a.storyblok.com/f/270183/1280x456/9db8540d11/local-numbers.png/m/)
Learn how to enable your customers to call you directly from your website.
![Click to Call](https://a.storyblok.com/f/270183/1280x456/280c471404/click-to-call.png/m/)
Generate a 1-to-1 video appointment workflow. This can be used for a doctor-patient, student-teacher, or any other 1-to-1 web scheduling application.
![1-to-1 Video Chats](https://a.storyblok.com/f/270183/1280x456/935e6f56bd/video-chats.png/m/)
Build your own contact center application.
Use the Number Insight and Developer API from Ruby code to validate, sanitize and determine the cost to call or message a number.
Add an extra layer of security when users perform sensitive tasks by confirming their identities.
![Two factor authentication](https://a.storyblok.com/f/270183/11231x4000/a5a9606e7d/two-factor-authentication.png/m/)