diff --git a/README.md b/README.md
index 8d032ff..5150f73 100644
--- a/README.md
+++ b/README.md
@@ -6,3 +6,17 @@
 - Ventoy CLI config
 - LaTeX to PDF by docker container
 - `get-ip-from-domain-names.sh` - take a list of domain names and print their IP addresses.
+- `gitlab-wiki-url.sh` - resolve a GitLab project or group wiki clone URL.
+
+## GitLab wiki URL helper
+
+Required environment variables:
+
+- `GITLAB_TOKEN` (only when `glab` is not available)
+
+Examples:
+
+```bash
+gitlab-wiki-url.sh https://gitlab.example.com/my-group/my-project
+gitlab-wiki-url.sh https://gitlab.example.com/my-group
+```
diff --git a/gitlab-wiki-url.sh b/gitlab-wiki-url.sh
new file mode 100755
index 0000000..6e19737
--- /dev/null
+++ b/gitlab-wiki-url.sh
@@ -0,0 +1,223 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+usage() {
+  cat <<'USAGE'
+Usage: gitlab-wiki-url.sh <gitlab_project_or_group_url>
+
+Returns the GitLab wiki clone URL for a project or group.
+
+Environment:
+  GITLAB_TOKEN  Personal access token used when glab is not available.
+
+Examples:
+  gitlab-wiki-url.sh https://gitlab.example.com/my-group/my-project
+  gitlab-wiki-url.sh https://gitlab.example.com/my-group
+USAGE
+}
+
+if [ "${1:-}" = "-h" ] || [ "${1:-}" = "--help" ]; then
+  usage
+  exit 0
+fi
+
+if [ -z "${1:-}" ]; then
+  usage
+  exit 1
+fi
+
+input_url="$1"
+
+parse_output=$(python3 - <<'PY' "$input_url"
+import sys
+from urllib.parse import urlparse
+
+raw = sys.argv[1]
+parsed = urlparse(raw)
+if not parsed.scheme or not parsed.netloc:
+    print("Invalid URL: missing scheme or host", file=sys.stderr)
+    sys.exit(1)
+
+path = parsed.path.strip("/")
+if path.endswith(".git"):
+    path = path[:-4]
+path = path.strip("/")
+if not path:
+    print("Invalid URL: missing project or group path", file=sys.stderr)
+    sys.exit(1)
+
+print(parsed.netloc)
+print(path)
+PY
+) || {
+  usage
+  exit 1
+}
+
+host=$(printf '%s' "$parse_output" | head -n 1)
+path=$(printf '%s' "$parse_output" | tail -n 1)
+
+encoded_path=$(python3 - <<'PY' "$path"
+import sys
+from urllib.parse import quote
+
+print(quote(sys.argv[1], safe=""))
+PY
+)
+
+base_api="https://${host}/api/v4"
+use_glab=false
+if command -v glab >/dev/null 2>&1; then
+  use_glab=true
+fi
+
+API_STATUS=""
+API_BODY_FILE=""
+
+cleanup() {
+  if [ -n "${API_BODY_FILE:-}" ] && [ -f "$API_BODY_FILE" ]; then
+    rm -f "$API_BODY_FILE"
+  fi
+}
+trap cleanup EXIT
+
+api_get() {
+  local endpoint="$1"
+  API_BODY_FILE=$(mktemp)
+  if $use_glab; then
+    local output
+    output=$(glab api --hostname "$host" -i "$endpoint" 2>&1 || true)
+    API_STATUS=$(printf '%s\n' "$output" | awk 'NR==1 {print $2}')
+    if [ -z "$API_STATUS" ]; then
+      printf '%s\n' "$output" >&2
+      return 1
+    fi
+    printf '%s\n' "$output" | awk 'BEGIN{header=1} header==1 && $0=="" {header=0; next} header==0 {print}' >"$API_BODY_FILE"
+    return 0
+  fi
+
+  if [ -z "${GITLAB_TOKEN:-}" ]; then
+    echo "GITLAB_TOKEN is required when glab is not available." >&2
+    return 1
+  fi
+
+  local response
+  response=$(curl -sS -D - -H "PRIVATE-TOKEN: ${GITLAB_TOKEN}" "${base_api}/${endpoint}" || true)
+  API_STATUS=$(printf '%s\n' "$response" | awk 'NR==1 {print $2}')
+  if [ -z "$API_STATUS" ]; then
+    printf '%s\n' "$response" >&2
+    return 1
+  fi
+  printf '%s\n' "$response" | awk 'BEGIN{header=1} header==1 && $0=="" {header=0; next} header==0 {print}' >"$API_BODY_FILE"
+  return 0
+}
+
+project_wiki_url() {
+  local repo_url="$1"
+  if [[ "$repo_url" == *.git ]]; then
+    printf '%s' "${repo_url%.git}.wiki.git"
+    return 0
+  fi
+  printf '%s.wiki.git' "$repo_url"
+}
+
+if ! api_get "projects/${encoded_path}"; then
+  echo "Failed to query GitLab API for project." >&2
+  exit 1
+fi
+
+if [ "$API_STATUS" = "200" ]; then
+  project_info=$(python3 - <<'PY' "$API_BODY_FILE"
+import json
+import sys
+
+with open(sys.argv[1], "r", encoding="utf-8") as handle:
+    data = json.load(handle)
+
+print("true" if data.get("wiki_enabled") else "false")
+print(data.get("http_url_to_repo", ""))
+print(data.get("ssh_url_to_repo", ""))
+PY
+)
+  wiki_enabled=$(printf '%s' "$project_info" | head -n 1)
+  http_repo=$(printf '%s' "$project_info" | sed -n '2p')
+  ssh_repo=$(printf '%s' "$project_info" | sed -n '3p')
+
+  if [ "$wiki_enabled" != "true" ]; then
+    echo "Project wiki is disabled." >&2
+    exit 2
+  fi
+
+  repo_url="$http_repo"
+  if [ -z "$repo_url" ]; then
+    repo_url="$ssh_repo"
+  fi
+
+  if [ -z "$repo_url" ]; then
+    echo "Project repository URL not available from API." >&2
+    exit 1
+  fi
+
+  project_wiki_url "$repo_url"
+  echo
+  exit 0
+fi
+
+if [ "$API_STATUS" != "404" ]; then
+  echo "Unexpected response when looking up project (status $API_STATUS)." >&2
+  exit 1
+fi
+
+if ! api_get "groups/${encoded_path}"; then
+  echo "Failed to query GitLab API for group." >&2
+  exit 1
+fi
+
+if [ "$API_STATUS" = "404" ]; then
+  echo "No project or group found for path: $path" >&2
+  exit 1
+fi
+
+if [ "$API_STATUS" != "200" ]; then
+  echo "Unexpected response when looking up group (status $API_STATUS)." >&2
+  exit 1
+fi
+
+group_info=$(python3 - <<'PY' "$API_BODY_FILE"
+import json
+import sys
+
+with open(sys.argv[1], "r", encoding="utf-8") as handle:
+    data = json.load(handle)
+
+print(data.get("id", ""))
+print(data.get("web_url", ""))
+PY
+)
+
+group_id=$(printf '%s' "$group_info" | head -n 1)
+group_web_url=$(printf '%s' "$group_info" | tail -n 1)
+
+if [ -z "$group_id" ] || [ -z "$group_web_url" ]; then
+  echo "Group information missing from API response." >&2
+  exit 1
+fi
+
+if ! api_get "groups/${group_id}/wikis"; then
+  echo "Failed to query GitLab API for group wiki." >&2
+  exit 1
+fi
+
+if [ "$API_STATUS" = "404" ]; then
+  echo "Group wiki does not exist." >&2
+  exit 2
+fi
+
+if [ "$API_STATUS" != "200" ]; then
+  echo "Unexpected response when looking up group wiki (status $API_STATUS)." >&2
+  exit 1
+fi
+
+group_web_url=${group_web_url%/}
+printf '%s.wiki.git\n' "$group_web_url"