Bender Bending Rodríguez is a Robot, he was built as Bending Unit 22.
But what was he built for? I mean, did Mom's Friendly Robot Company sell him to another organization for profit? This is what a company usually builds stuff for, no?
I don't think his behavior could imply he is a actually slave in any way. So, did he have to do something to buy is freedom? Or is he still legally the property of someone or something?