Could you please give explanation of word “curled” in the next sentence
I curled it and it correctly returns status code 400.
And please provide characteristic of it (how much is it slangy?), and another examples of usage in this meaning.
You’re a victim of ‘verbing’. cURL is just the name of a program that the author was using to test something:
cURL (/kə:(r)l/.) is a computer software project providing a library and command-line tool for transferring data using various protocols.