RewriteEngine on

#rewrite details GET parameter
RewriteCond %{QUERY_STRING} ^app=([^&]+)
RewriteRule ^api/v1/details /api/v1/details-data/%1.json?

RewriteRule ^api/v1/apps/(.*)/download$ /api/v1/apps/$1-download.json? [END]
RewriteRule ^api/v1/apps/(.*)$ /api/v1/apps/$1.json? [END]

RewriteRule ^api/v1/discover/?$ /api/v1/discover.json [END]
RewriteRule ^api/v1/discover/(.+)$ /api/v1/discover-data/$1.json [END]

#this one wants a 204 status code
RewriteRule ^api/v1/status$ - [R=204,NC,L]