diff --git a/examples/fixlet_add_mime_field.py b/examples/fixlet_add_mime_field.py
new file mode 100644
index 0000000..c18ab5b
--- /dev/null
+++ b/examples/fixlet_add_mime_field.py
@@ -0,0 +1,85 @@
+"""
+Add mime field to custom content
+
+Need to url escape site name https://bigfix:52311/api/sites
+"""
+import lxml.etree
+
+import besapi
+
+FIXLET_NAME = "Install Microsoft Orca from local SDK - Windows"
+MIME_FIELD = "x-relevance-evaluation-period"
+session_relevance = (
+    'custom bes fixlets whose(name of it = "'
+    + FIXLET_NAME
+    + '" AND not exists mime fields "'
+    + MIME_FIELD
+    + '" of it)'
+)
+
+
+def main():
+    """Execution starts here"""
+    print("main()")
+    bes_conn = besapi.besapi.get_bes_conn_using_config_file()
+    bes_conn.login()
+
+    data = {"relevance": "id of " + session_relevance}
+
+    result = bes_conn.post(bes_conn.url("query"), data)
+
+    # example result: fixlet/custom/Public%2fWindows/21405
+    # full example: https://bigfix:52311/api/fixlet/custom/Public%2fWindows/21405
+    fixlet_id = int(result.besdict["Query"]["Result"]["Answer"])
+
+    print(fixlet_id)
+
+    data = {"relevance": "name of site of " + session_relevance}
+
+    result = bes_conn.post(bes_conn.url("query"), data)
+
+    fixlet_site_name = str(result.besdict["Query"]["Result"]["Answer"])
+
+    fixlet_site_name = fixlet_site_name.replace("/", "%2f")
+
+    print(fixlet_site_name)
+
+    fixlet_content = bes_conn.get_content_by_resource(
+        f"fixlet/custom/{fixlet_site_name}/{fixlet_id}"
+    )
+
+    # print(fixlet_content)
+
+    root_xml = lxml.etree.fromstring(fixlet_content.besxml)
+
+    xml_first_mime = root_xml.find(".//*/MIMEField")
+
+    xml_container = xml_first_mime.getparent()
+
+    print(lxml.etree.tostring(xml_first_mime))
+
+    print(xml_container.index(xml_first_mime))
+
+    new_mime = lxml.etree.XML(
+        """<MIMEField>
+			<Name>x-relevance-evaluation-period</Name>
+			<Value>01:00:00</Value>
+		</MIMEField>"""
+    )
+
+    print(lxml.etree.tostring(new_mime))
+
+    # insert new mime BEFORE first MIME
+    xml_container.insert(xml_container.index(xml_first_mime) - 1, new_mime)
+
+    print(
+        lxml.etree.tostring(root_xml, encoding="utf-8", xml_declaration=True).decode(
+            "utf-8"
+        )
+    )
+
+    # TODO: PUT changed XML back to RESTAPI resource to modify
+
+
+if __name__ == "__main__":
+    main()