diff --git a/lib/infusionsoft/configuration.rb b/lib/infusionsoft/configuration.rb
index 790e242..a39210d 100644
--- a/lib/infusionsoft/configuration.rb
+++ b/lib/infusionsoft/configuration.rb
@@ -7,6 +7,7 @@ module Configuration
     VALID_OPTION_KEYS = [
       :api_url,
       :api_key,
+      :api_token,
       :api_logger,
       :use_oauth,
       :user_agent # allows you to change the User-Agent of the request headers
@@ -48,6 +49,10 @@ def user_agent
     def api_logger
       @api_logger || Infusionsoft::APILogger.new
     end
+
+    def api_key
+      @api_key || 'na'
+    end
   end
 
 end
diff --git a/lib/infusionsoft/connection.rb b/lib/infusionsoft/connection.rb
index a73552e..8e7b5a1 100755
--- a/lib/infusionsoft/connection.rb
+++ b/lib/infusionsoft/connection.rb
@@ -5,8 +5,20 @@ module Infusionsoft
   module Connection
     private
 
+    
     def connection(service_call, *args)
-      path = use_oauth ? "/crm/xmlrpc/v1?access_token=#{api_key}" : "/api/xmlrpc"
+
+      headers = {'User-Agent' => user_agent}
+
+      if api_token
+        api_url = 'api.infusionsoft.com'
+        path = "/crm/xmlrpc/v1"
+        headers["X-Keap-API-Key"] = api_token
+      elsif use_oauth
+        path = "/crm/xmlrpc/v1?access_token=#{api_key}"
+      else
+        path = "/api/xmlrpc"
+      end
       
       client = XMLRPC::Client.new3({
         'host' => api_url,
@@ -14,7 +26,9 @@ def connection(service_call, *args)
         'port' => 443,
         'use_ssl' => true
       })
-      client.http_header_extra = {'User-Agent' => user_agent}
+      
+      client.http_header_extra = headers
+      
       begin
         api_logger.info "CALL: #{service_call} api_url: #{api_url} at:#{Time.now} args:#{args.inspect}"
         result = client.call("#{service_call}", api_key, *args)