Erik Lagerway, a former TMC blogger, is excited about his REST-based VoIP API and wholesale VoIP termination service, which he claims decreases the time to market for developers when integrating VoIP into any application. Erik emailed  me, "We have built a REST-based VoIP API that will fast track VoIP Integration for any developer that understands XML," said Lypp CEO Erik Lagerway.

Here is a sample VoIP API call, which as you will notice uses XML:

Request:

GET /users/{user_id}/conferences
Accept: application/xml Response:

200 OK
Content-Type: application/xml

<?xml version="1.0" encoding="UTF-8"?>
<conferences type="array">
<conference>
<id type="integer">{conference_id}</id>
<created-at type="datetime">{created_at}</created-at>
<updated-at type="datetime">{updated_at}</updated-at>
<state>{state}</state>
<scheduled-to-start-at type="datetime">{scheduled_to_start_at}</scheduled-to-start-at>
<started-at type="datetime">{started_at}</started-at>
<ended-at type="datetime">{ended_at}</ended-at>
</conference>
...
</conferences>
This use of XML as the VoIP API reminds me that Microsoft Live Meeting 2007, Microsoft's collaborative online meeting application featuring VoIP and videoconferencing also leverages XML to allow you to schedule meetings, manager users, and perform reporting functionality. The APIs actually look quite similar come to think of it. They use similar XML calls to create a conference.