get https://api.securitytrails.com/v1/feeds/subdomains/
Download a list of subdomains, with the possibility of filtering by TLD. The response itself is streamed to a file, which means the data is received in chunks. When using filter you must specify the tld parameter and vise versa. The method returns a .csv.gz file if successful. The columns are apex_domain,hostname.
Addon subscription required
Using this API endpoint requires a SecurityTrails Feeds subscription.