diff --git a/tool/find-untested-neon-apis.sh b/tool/find-untested-neon-apis.sh
new file mode 100755
index 00000000..57dfbfb1
--- /dev/null
+++ b/tool/find-untested-neon-apis.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+set -euxo pipefail
+cd "$(dirname "$0")/.."
+
+function find_apis() {
+    path="$1"
+    grep -r "$path" --include "*\.dart" -e "client\.[^.]*.[^(]*(" -oh | sed "s/^client\.//" | sed "s/($//" | sed "s/Raw$//" | sort | uniq
+}
+
+used_apis=("$(find_apis "packages/neon")")
+tested_apis=("$(find_apis "packages/nextcloud")")
+
+untested_apis=()
+
+for used_api in ${used_apis[*]}; do
+  tested=0
+
+  for tested_api in ${tested_apis[*]}; do
+    if [[ "$tested_api" == "$used_api" ]]; then
+      tested=1
+      break
+    fi
+  done
+
+  if [[ "$tested" == 0 ]]; then
+    untested_apis+=("$used_api")
+  fi
+done
+
+if [[ -n "${untested_apis[*]}" ]]; then
+  printf "%s\n" "${untested_apis[@]}"
+  exit 1
+fi