diff --git a/Scripts/unused-functions.sh b/Scripts/unused-functions.sh
new file mode 100755
index 000000000..af074de34
--- /dev/null
+++ b/Scripts/unused-functions.sh
@@ -0,0 +1,71 @@
+#!/bin/sh
+
+# Copyright (c) 2025 Franco Fichtner <franco@opnsense.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+
+PLUGINS="configure cron devices firewall interfaces run services syslog xmlprc_sync"
+
+if [ -n "${1}" ]; then
+	cd "${1}"
+fi
+
+TESTDIR=src
+
+DIRS=${TESTDIR}
+NOTE="(did not check plugins)"
+
+if [ -d ../plugins ]; then
+	DIRS="${DIRS} ../plugins"
+	NOTE="(cross-checked plugins)"
+fi
+
+grep -Eor '^function &?[^( ]+' ${TESTDIR} | tr ':' ' ' | tr -d '&' | while read FILE X FUNC; do
+	BASEDIR=$(dirname ${FILE})
+	BASEDIR=$(basename ${BASEDIR})
+	MODULE=$(basename ${FILE})
+	MODULE=${MODULE%.inc}
+
+
+	# exclude indirect plugin calls not otherwise referenced
+	if [ "${BASEDIR}" = "plugins.inc.d" ]; then
+		for PLUGIN in ${PLUGINS}; do
+			if [ "${FUNC}" = "${MODULE}_${PLUGIN}" ]; then
+				continue 2
+			fi
+		done
+	fi
+
+	# either by direct call xxx( or wrapped in single quotes
+	USED=$(grep -Fr -e "${FUNC}(" -e "'${FUNC}'" ${DIRS} | wc -l | awk '{ print $1 }')
+	if [ ${USED} -le 1 ]; then
+		echo "${FUNC}() appears unused" ${NOTE}
+	elif [ ${USED} -eq 2 ]; then
+		# XXX if a match happens in the same file it's probably already considered ;)
+		echo "${FUNC}() only used once, consider refactor"
+	else
+		USED=$((USED - 1))
+		#echo "${FUNC}() used ${USED} times"
+	fi
+done