diff --git a/frontend/public/json/nextcloud-exporter.json b/frontend/public/json/nextcloud-exporter.json
new file mode 100644
index 000000000..7866fc152
--- /dev/null
+++ b/frontend/public/json/nextcloud-exporter.json
@@ -0,0 +1,35 @@
+{
+  "name": "Nextcloud Exporter",
+  "slug": "nextcloud-exporter",
+  "categories": [
+    9
+  ],
+  "date_created": "2025-12-17",
+  "type": "addon",
+  "updateable": true,
+  "privileged": false,
+  "interface_port": 9205,
+  "documentation": "https://github.com/xperimental/nextcloud-exporter",
+  "website": "https://github.com/xperimental/nextcloud-exporter",
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/nextcloud.webp",
+  "config_path": "/etc/nextcloud-exporter.env",
+  "description": "Prometheus exporter for Nextcloud servers. ",
+  "install_methods": [
+    {
+      "type": "default",
+      "script": "tools/addon/nextcloud-exporter.sh",
+      "resources": {
+        "cpu": null,
+        "ram": null,
+        "hdd": null,
+        "os": null,
+        "version": null
+      }
+    }
+  ],
+  "default_credentials": {
+    "username": null,
+    "password": null
+  },
+  "notes": []
+}
diff --git a/tools/addon/nextcloud-exporter.sh b/tools/addon/nextcloud-exporter.sh
new file mode 100644
index 000000000..149f6394c
--- /dev/null
+++ b/tools/addon/nextcloud-exporter.sh
@@ -0,0 +1,209 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021-2025 community-scripts ORG
+# Author: CrazyWolf13
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://github.com/xperimental/nextcloud-exporter
+
+source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/core.func)
+source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/tools.func)
+source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/error_handler.func)
+
+# Enable error handling
+set -Eeuo pipefail
+trap 'error_handler' ERR
+load_functions
+
+# ==============================================================================
+# CONFIGURATION
+# ==============================================================================
+VERBOSE=${var_verbose:-no}
+APP="nextcloud-exporter"
+APP_TYPE="tools"
+BINARY_PATH="/usr/bin/nextcloud-exporter"
+CONFIG_PATH="/etc/nextcloud-exporter.env"
+SERVICE_PATH="/etc/systemd/system/nextcloud-exporter.service"
+
+# ==============================================================================
+# OS DETECTION
+# ==============================================================================
+if ! grep -qE 'ID=debian|ID=ubuntu' /etc/os-release 2>/dev/null; then
+  echo -e "${CROSS} Unsupported OS detected. This script only supports Debian and Ubuntu."
+  exit 1
+fi
+
+# ==============================================================================
+# UNINSTALL
+# ==============================================================================
+function uninstall() {
+  msg_info "Uninstalling Nextcloud-Exporter"
+  systemctl disable -q --now nextcloud-exporter
+  rm -f "$SERVICE_PATH"
+
+  if dpkg -l | grep -q nextcloud-exporter; then
+    $STD apt-get remove -y nextcloud-exporter || $STD dpkg -r nextcloud-exporter
+  fi
+
+  rm -f "$CONFIG_PATH"
+  rm -f "/usr/local/bin/update_nextcloud-exporter"
+  rm -f "$HOME/.nextcloud-exporter"
+  msg_ok "Nextcloud-Exporter has been uninstalled"
+}
+
+# ==============================================================================
+# UPDATE
+# ==============================================================================
+function update() {
+  if check_for_gh_release "nextcloud-exporter" "xperimental/nextcloud-exporter"; then
+    msg_info "Stopping service"
+    systemctl stop nextcloud-exporter
+    msg_ok "Stopped service"
+
+    fetch_and_deploy_gh_release "nextcloud-exporter" "xperimental/nextcloud-exporter" "binary" "latest"
+
+    msg_info "Starting service"
+    systemctl start nextcloud-exporter
+    msg_ok "Started service"
+    msg_ok "Updated successfully"
+    exit
+  fi
+}
+
+# ==============================================================================
+# INSTALL
+# ==============================================================================
+function install() {
+  read -erp "Enter URL of Nextcloud, example: (http://127.0.0.1:8080): " NEXTCLOUD_SERVER
+  read -rsp "Enter Nextcloud auth token (press Enter to use username/password instead): " NEXTCLOUD_AUTH_TOKEN
+  printf "\n"
+
+  if [[ -z "$NEXTCLOUD_AUTH_TOKEN" ]]; then
+    read -erp "Enter Nextcloud username: " NEXTCLOUD_USERNAME
+    read -rsp "Enter Nextcloud password: " NEXTCLOUD_PASSWORD
+    printf "\n"
+  fi
+
+  read -erp "Query additional info for apps? [Y/n]: " QUERY_APPS
+  if [[ "${QUERY_APPS,,}" =~ ^(n|no)$ ]]; then
+    NEXTCLOUD_INFO_APPS="false"
+  fi
+
+  read -erp "Query update information? [Y/n]: " QUERY_UPDATES
+  if [[ "${QUERY_UPDATES,,}" =~ ^(n|no)$ ]]; then
+    NEXTCLOUD_INFO_UPDATE="false"
+  fi
+
+  read -erp "Do you want to skip TLS-Verification (if using a self-signed Certificate on Nextcloud) [y/N]: " SKIP_TLS
+  if [[ "${SKIP_TLS,,}" =~ ^(y|yes)$ ]]; then
+    NEXTCLOUD_TLS_SKIP_VERIFY="true"
+  fi
+
+  fetch_and_deploy_gh_release "nextcloud-exporter" "xperimental/nextcloud-exporter" "binary" "latest"
+
+  msg_info "Creating configuration"
+  cat <<EOF >"$CONFIG_PATH"
+# https://github.com/xperimental/nextcloud-exporter
+NEXTCLOUD_SERVER="${NEXTCLOUD_SERVER}"
+NEXTCLOUD_AUTH_TOKEN="${NEXTCLOUD_AUTH_TOKEN:-}"
+NEXTCLOUD_USERNAME="${NEXTCLOUD_USERNAME:-}"
+NEXTCLOUD_PASSWORD="${NEXTCLOUD_PASSWORD:-}"
+NEXTCLOUD_INFO_UPDATE=${NEXTCLOUD_INFO_UPDATE:-"true"}
+NEXTCLOUD_INFO_APPS=${NEXTCLOUD_INFO_APPS:-"true"}
+NEXTCLOUD_TLS_SKIP_VERIFY=${NEXTCLOUD_TLS_SKIP_VERIFY:-"false"}
+NEXTCLOUD_LISTEN_ADDRESS=":9205"
+EOF
+  msg_ok "Created configuration"
+
+  msg_info "Creating service"
+  cat <<EOF >"$SERVICE_PATH"
+[Unit]
+Description=nextcloud-exporter
+After=network.target
+
+[Service]
+User=root
+EnvironmentFile=$CONFIG_PATH
+ExecStart=$BINARY_PATH
+Restart=always
+
+[Install]
+WantedBy=multi-user.target
+EOF
+  systemctl daemon-reload
+  systemctl enable -q --now nextcloud-exporter
+  msg_ok "Created and started service"
+
+  # Create update script
+  msg_info "Creating update script"
+  ensure_usr_local_bin_persist
+  cat <<'UPDATEEOF' >/usr/local/bin/update_nextcloud-exporter
+#!/usr/bin/env bash
+# nextcloud-exporter Update Script
+type=update bash -c "$(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/tools/addon/nextcloud-exporter.sh)"
+UPDATEEOF
+  chmod +x /usr/local/bin/update_nextcloud-exporter
+  msg_ok "Created update script (/usr/local/bin/update_nextcloud-exporter)"
+
+  echo ""
+  msg_ok "Nextcloud-Exporter installed successfully"
+  msg_ok "Metrics: ${BL}http://${LOCAL_IP}:9205/metrics${CL}"
+  msg_ok "Config: ${BL}${CONFIG_PATH}${CL}"
+}
+
+# ==============================================================================
+# MAIN
+# ==============================================================================
+header_info
+ensure_usr_local_bin_persist
+import_local_ip
+
+# Handle type=update (called from update script)
+if [[ "${type:-}" == "update" ]]; then
+  if [[ -f "$BINARY_PATH" ]]; then
+    update
+  else
+    msg_error "Nextcloud-Exporter is not installed. Nothing to update."
+    exit 1
+  fi
+  exit 0
+fi
+
+# Check if already installed
+if [[ -f "$BINARY_PATH" ]]; then
+  msg_warn "Nextcloud-Exporter is already installed."
+  echo ""
+
+  echo -n "${TAB}Uninstall Nextcloud-Exporter? (y/N): "
+  read -r uninstall_prompt
+  if [[ "${uninstall_prompt,,}" =~ ^(y|yes)$ ]]; then
+    uninstall
+    exit 0
+  fi
+
+  echo -n "${TAB}Update Nextcloud-Exporter? (y/N): "
+  read -r update_prompt
+  if [[ "${update_prompt,,}" =~ ^(y|yes)$ ]]; then
+    update
+    exit 0
+  fi
+
+  msg_warn "No action selected. Exiting."
+  exit 0
+fi
+
+# Fresh installation
+msg_warn "Nextcloud-Exporter is not installed."
+echo ""
+echo -e "${TAB}${INFO} This will install:"
+echo -e "${TAB}  - Nextcloud Exporter (binary)"
+echo -e "${TAB}  - Systemd service"
+echo ""
+
+echo -n "${TAB}Install Nextcloud-Exporter? (y/N): "
+read -r install_prompt
+if [[ "${install_prompt,,}" =~ ^(y|yes)$ ]]; then
+  install
+else
+  msg_warn "Installation cancelled. Exiting."
+  exit 0
+fi