I'm not sure the `parameters` is needed. The `nextPageUrl` is returned as part of the previous page's response in the `Link` header. I would assume it would be a fully formed URL for retrieving the next page of results. See the [pagination docs](http://developer.github.com/v3/#pagination) for the GitHub API for more details. Were you finding that this was not the case?

The `accepts` parameter, on the other hand, makes total sense!