Join GitHub today
GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.Sign up
TL;DR there are API servers that are case sensitive. Yes, this is not HTTP-compliant.
I think the Amp client should reconsider and do the same. At least on Symfony's side, the current strict behavior means we're not sure if we can ship Amp's implementation as the default one (when it is installed).