How Do I Properly Use CURL --POST to Send Data in a Request? or What’s the Correct Syntax for CURL --

For debugging CURL --POST, use `--trace-ascii dump.txt` to log everything. Helps spot weird encoding issues.

JSON needs headers, form data usually doesn’t. But if the server’s picky, you might need `-H "Content-Type: application/x-www-form-urlencoded"` for form stuff.

Also, `jq` is great for validating JSON before sending.