To access the changes feed, firstly get an API Token

Use curl -H "Authorization: Bearer $TOKEN" "$API/changes" to get a list of all changes along with their sequence number. In this case $TOKEN is the API token, and $API is the url + /api (i.e https://tess.whitespace.co.uk/api)

Use curl -H "Authorization: Bearer $TOKEN" "$API/changes/seq" to get the current change sequence. 

Run curl -H "Authorization: Bearer $TOKEN" "$API/changes?since=$SEQ" to get the list of changes since that sequence, where $SEQ is the sequence number.