Login to whiteboard.chat, the location where you want to get the key. Click the settings button on the top right (in Teaching or Collaborating mode)

Click the SHOW API key button. Copy it and keep for future use.
<iframe allow="camera; microphone" src='https://whiteboard.vitoc/whiteboard/[BOARD_UUID]?key=[DEVELOPER_KEY]&user_type=tutor />
Please replace [BOARD_UUID] with a generated UUID and [DEVELOPER_KEY] with the API key from Step 1. To start the session, teacher=true needs to be passed.
That is it, you can use the following options for the iframe URL to pass arguments
&bg=https%3A%2F%2Fi.imgur.com%2Fg16lJOf.jpeg&xAxis=5&yAxis=5&bgw=500&bgh=500
Sample code included below for completeness. Please use a generated, valid UUID and your API Key in the sample below (exclude the []). The UUID doesn’t need to be known to whiteboard.chat, it just needs to be unique.
Teacher
<html>
<head>
</head>
<body>
<div style="border: 2px solid blue">
<iframe title="VTIOC.Whiteboard In iframe"
style="position: relative; width: 100%; height: 100%; min-width: 1000px;"
src="https://whiteboard.vitoc/whiteboard/[UUID]?key=[APIKEY]&teacher=true&resetStore=true&username=teacher&userEmail=teacher@school.com"
frameborder="0"
allow="camera; microphone">
</iframe>
</div>
</body>
</html>
Student
Please make sure to open the student html in a different browser from the teacher.
<html>
<head>
</head>
<body>
<div style="border: 2px solid blue">
<iframe title="Whiteboard.chat In iframe"
style="position: relative; width: 100%; height: 100%; min-width: 1000px;"
src="https://whiteboard.vitoc/students/[UUID]?key=[APIKEY]&resetStore=true&username=student&userEmail=student@school.com"
frameborder="0"
allow="camera; microphone">
</iframe>
</div>
</body>
</html>