Sample using cURL to get all the templates.

curl --header "Content-Type: application/json" \\
  --header "Authorization: Bearer API_TOKEN" \\
  --request GET \\
  <https://api.mockupsjar.com/mockups/list>

Output

{"status":"success","data":[{"slug":"ripped-torn-paper-1","name":"Ripped Torn Paper 1","width":640,"height":427,"previewURL":"<https://mockupsjar-production.s3-eu-west-1.amazonaws.com/renders/ripped-torn-paper-1-oc8ltJa6Nf4dVnhF.jpg>"}, ...