Developer Garden Voice Record API

Developer Garden is a German company that creates a variety of telecommunications and marketplace API's. They also produce freely available "labs" API's, including Voice Record - a web service designed to establish a connection within German telecommunication networks, and then allow the called number to record a voice message that will be stored in the cloud for later use.

The API allows these messages to be recorded in MP3 or WAV formats. Recorded audio files can be downloaded later, integrated with and played via applications or websites, or deleted. Up to 30 minutes of audio can be recorded at a time, and audio is immediately accessible after recording. Parameters for creating a recording include establishing a maximum recording time, integrating a message that is played if the callee is not speaking loud enough, setting up welcome and goodbye messages, and establishing an automated start time (within 24 hours) for the call to start. This API is available via REST and SOAP, though the REST documentation is much more thorough.