I faced this error SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed when I try to implement the following: JSON.parse(open(“http://api……”).read). I found the solution to fix this SSL error right from Windows, here is how : 

• Download or click here to view into C:Ruby200-x64cacert.pem
• Go to your Computer -> Advanced Settings -> Environment Variables to create a new System Variable:
  • Variable: SSL_CERT_FILE
  • Value: C:Ruby200-x64cacert.pem