I created a Skuid Platform to explore what can be done.

1.  I created a new data source that was REST data type.
According to the github API docs, it is required to set these  default headers

• Accept: application/vnd.github.v3+json
• User-Agent: joseph-ortiz

2. I created a blank page and added a model with the the newly created data source. 
3. I then previewed the page and noticed in the console that there was error that reads:

"Refused to set unsafe header “User-Agent”

I figure I can create another API that wraps around the github endpoint but wanted to see if you ran into this issue.

the actual call i’m trying to make is

GET /users?since=135 HTTP/1&#46;1Host: api&#46;github&#46;com<br />User-Agent: joseph-ortiz<br />Accept: application/vnd&#46;github&#46;v3+json

thanks!