square API needs to be whitelisted

hello, when I try to hit the squreup API I am getting this error:

ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 403 Forbidden'))

After looking at other forum posts it seems as though this domain needs to be whitelisted.

Thank you

the domain is:

Could you give us a link to some documentation on saying that is an official API?

Thanks -- that's whitelisted now.