How can i bind source using API?

[VaibhavFortress]

In Jquery-ui autocomplete sample,

"customFormItems": {
"name": {
"type": "text",
"autocomplete": {
"source": ['abc', 'bed', 'bee', 'dog', 'cat']
}
}
}

i want to bind the source from api. Is there any sample or any way to bind the source from API ?