XML-RPC call:

<?xml version="1.0"?>
<methodCall>
<methodName>mailkit.mailinglist.getstatus</methodName>
<params>
  <param><value><int>client_id</int></value></param>
  <param><value><string>client_md5_hash_here</string></value></param>  
  <param><value><int>email_id</int></value></param>
</params>
</methodCall>

give back an array contained:

EMAIL
DATE
STATUS
FIRST_NAME
LAST_NAME
NICK_NAME
GENDER
PHONE
MOBILE
FAX
STREET
CITY
STATE
COUNTRY
ZIP
CUSTOM_1
CUSTOM_2
CUSTOM_3