curl.sh

curl --data @xmlrpc.xml http://src.wordpress-develop.dev/xmlrpc.php

response.xml

<?xml version="1.0" encoding="UTF-8"?>
<methodResponse>
  <params>
    <param>
      <value>
      <struct>
  <member><name>id</name><value><int>43</int></value></member>
  <member><name>url</name><value><string>http://src.wordpress-develop.dev/wp-content/uploads/2014/05/wordpress-logo-stacked-rgb.png</string></value></member>
</struct>
      </value>
    </param>
  </params>
</methodResponse>

xmlrpc.xml

<?xml version="1.0"?>
<methodCall>
	<methodName>
		wp.sideloadFile
	</methodName>
	<params>
		<param>
			<value>
				<array>
					<data>
						<value>
							<int>
								0
							</int>
						</value>
						<value>
							<string>
								admin
							</string>
						</value>
						<value>
							<string>
								password	
							</string>
						</value>
						<value>
							<struct>
								<member>
									<name>
										url
									</name>
									<value>
										<string>
											http://s.w.org/about/images/logos/wordpress-logo-stacked-rgb.png
										</string>
									</value>
								</member>
								<member>
									<name>
										md5
									</name>
									<value>
										<string>
											306c122f643c03a86560349f06656720
										</string>
									</value>
								</member>
								<member>
									<name>
										desc
									</name>
									<value>
										<string>
											The WordPress Logo
										</string>
									</value>
								</member>
							</struct>
						</value>
					</data>
				</array>
			</value>
		</param>
	</params>
</methodCall>