[b]"How to Properly Send POST Data with curl? Need Help!"[/b] or [b]"What’s the Best Way to Use curl POST Data in

Pro tip: Use `curl --trace-ascii debug.txt` to dump everything to a file. Super handy for debugging curl post data issues.

Also, `-d` and `--data-raw` are *almost* the same, but `--data-raw` won’t interpret `@filename` as a file read. Stick with `-d` unless you need raw.

For JSON, always double-check your quotes—some shells eat them up.