verification is using SSL but need to update my certificates since they block external requests for being selfsigned ;)
https://steempay.io/payment/verify?payid=Re3Hbl1ekAeSwVtzKS&receiver=steve-walschot&amount=0.001¤cy=SBD
works just fine, but once your curl it, it's getting blocked. Should be resolved in max 24h from now.
you can get a letsencrypt certificate for this. dont pay for certificates from big corporations. letsencrypt is free and open!