The Unblocked API is currently in beta and subject to breaking changes
List operations in the Unblocked API support pagination. Responses for these operations will include a link header if additional results exist. This header is omitted if all results fit on a single page. The link header will look something like: 
link: <https://getunblocked.com/api/v1/documents?limit=25&before=eyJjcmVhdGVkQXQiOiAi...>; rel="prev",
<https://getunblocked.com/api/v1/documents?limit=25&after=eyJjcmVhdGVkQXQiOiIy...>; rel="next"
Parse the URL from the next relation to get the link for the next page of results.