diff --git a/tclchksum.py b/tclchksum.py
new file mode 100644
index 0000000..c392a57
--- /dev/null
+++ b/tclchksum.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+# pylint: disable=C0111,C0326,C0103
+
+import os
+import random
+import sys
+import tcllib
+
+fc = tcllib.FotaCheck()
+
+encslaves = [
+    "54.238.56.196",
+    "46.51.183.28",
+    "75.101.149.79",
+    "54.249.227.45",
+    "54.249.227.54",
+    "54.225.78.202",
+    "54.225.87.236",
+    "54.195.239.239",
+    "54.195.240.212",
+]
+
+dpdesc = """
+    Returns the checksum for a given firmware URI.
+    """
+dp = tcllib.DefaultParser(__file__, dpdesc)
+dp.add_argument("uri", help="URI to firmware, starts with '/body/...'")
+args = dp.parse_args(sys.argv[1:])
+
+fileurl = args.uri
+
+# /body/ce570ddc079e2744558f191895e524d02a60476f/32/268932
+#fileurl = "/body/ce570ddc079e2744558f191895e524d02a60476f/2c23717bb747f3c321195419f451de52efa8ea51/263790/268932"
+
+chksum_xml = fc.do_checksum(random.choice(encslaves), fileurl, fileurl)
+print(fc.pretty_xml(chksum_xml))
+file_addr, sha1_body, sha1_enc_footer, sha1_footer = fc.parse_checksum(chksum_xml)