@simonfakir Personal package I created last year to quickly create searchable API endpoints with nested data and pagination. Perhaps not best practice but I have used in several Lumen projects with great success.
if you use lumen 5.5 (or laravel)- transformers are built in.
logging debugging is easy - use logentries or something & built in Log::info()...
email is built in - u need to use mailgun or something to send emails
ACL - built in...
pagination - built in//
json mappin - not sure what u mean.. isnt it same as transformers?