the simplest way to integrate your subdomain enum outputs with Burp Pro (With Fast Crawler option)
Burp Pro Fast Crawler
-h, --help show this help message and exit
-f FILE, --file FILE List of domains/subdoamins
-i IP, --ip IP IP addr of Burp API (Default: 127.0.0.1)
-p PORT, --port PORT Port of Burp API (Default: 1337)
-k KEY, --key KEY Burp API Key
python3 burp-int.py -f <PathToList.txt> -k <BurpAPIKey>
I strongly advise you to set your scope(s) in Burp before running the script.