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diff --git a/grc/blocks/xmlrpc_server.xml b/grc/blocks/xmlrpc_server.xml
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+++ b/grc/blocks/xmlrpc_server.xml
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+<?xml version="1.0"?>
+<!--
+###################################################
+##Simple XMLRPC Server
+###################################################
+ -->
+<block>
+	<name>XMLRPC Server</name>
+	<key>xmlrpc_server</key>
+	<import>import SimpleXMLRPCServer</import>
+	<import>import threading</import>
+	<make>SimpleXMLRPCServer.SimpleXMLRPCServer(($addr, $port), allow_none=True)
+self.$(id).register_instance(self)
+threading.Thread(target=self.$(id).serve_forever).start()</make>
+	<param>
+		<name>Address</name>
+		<key>addr</key>
+		<value>localhost</value>
+		<type>string</type>
+	</param>
+	<param>
+		<name>Port</name>
+		<key>port</key>
+		<value>8080</value>
+		<type>int</type>
+	</param>
+	<doc>
+This block will start an XMLRPC server. \
+The server provides access to the run, start, stop, wait functions of the flow graph. \
+The server also provides access to the variable callbacks in the flow graph. \
+Ex: If the variable is called freq, the function provided by the server will be called set_freq(new_freq).
+
+Example client in python:
+
+import xmlrpclib
+s = xmlrpclib.Server('http://localhost:8080')
+s.set_freq(5000)
+	</doc>
+</block>