Dheerajmadhukar/4-ZERO-3 — reverse-engineered prompt

Build me a simple Bash command line tool for authorized security testing of my own endpoints. I want to give it a URL that normally returns 401 or 403, and have it try a bunch of common request variations to see whether the server behavior changes because of misconfigurations. Include separate modes for header based checks, protocol based checks, port based checks, HTTP method checks, URL encoding checks, and some basic SQLi filter evasion checks, plus one full scan mode that runs everything.

Use curl under the hood and make the output easy to read. Show the status code, content length, and highlight anything that looks like a possible bypass or unexpected access. If something interesting is found, print the exact curl command that produced it. Also warn that repeated 200 responses with the same content length may be false positives.

Please include a help screen with examples, keep it as one portable shell script, and assume I am running it on Linux with curl installed. Look up current docs online if you need to.