Allows easy integration with marketo from ruby. You can synchronize leads and fetch them back by email. By default this is configured for the SOAP wsdl file: http://app.marketo.com/soap/mktows/1_4?WSDL but this is configurable when you construct the client, e.g. client = Rapleaf::Marketo.new_client(, , (api_subdomain = 'na-i'), (api_version = '1_5'), (document_version = '1_4')) More information at https://www.rapleaf.com/developers/marketo.