sqlmap

sqlmap -r request.txt -v 3 --risk=3 --level=5 --dbs --threads 5 

Contents of request.txt file are as follows:

POST /{{endpoint}} HTTP/1.1
Host: {{domain_name}}
Content-Length: {{content_length}}
Cache-Control: {{cache_control}}
Accept: {{accept_type}}
Origin: {{origin}}
User-Agent: {{user_agent}}
Content-Type: {{content_type}}
Referer: {{referer}}
Accept-Encoding: {{accept_encoding}}
Accept-Language: {{accept_lang}}
Cookie: {{cookie}}