<IfModule mod_rewrite.c>
RewriteEngine On

# If your helpdesk is installed in a sub-directory, change /api to /<your subfolder>/api
RewriteBase /api

# remove index.php from URLs
RewriteCond %{THE_REQUEST} /index\.php [NC]
RewriteRule ^(.*?)index\.php$ $1 [L,R=302,NC,NE]

RewriteRule ^index\.php$ - [L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . index.php [L]
</IfModule>