5.1.6

fix(ci): correct setup-deno action version to install Deno 2.x
5.1.5
2025-10-23 13:18:22 +00:00 · 2025-10-23 13:17:56 +00:00 · 2025-10-23 13:15:44 +00:00 · 2025-10-23 13:03:35 +00:00 · 2025-10-23 13:03:29 +00:00 · 2025-10-23 13:00:24 +00:00
16 changed files with 1014 additions and 89 deletions
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -21,7 +21,7 @@ jobs:
      - name: Set up Deno
        uses: denoland/setup-deno@v1
        with:
-          deno-version: v1.x
+          deno-version: v2.x

      - name: Check TypeScript types
        run: deno check mod.ts
@@ -45,7 +45,7 @@ jobs:
      - name: Set up Deno
        uses: denoland/setup-deno@v1
        with:
-          deno-version: v1.x
+          deno-version: v2.x

      - name: Compile for current platform
        run: |
@@ -71,7 +71,7 @@ jobs:
      - name: Set up Deno
        uses: denoland/setup-deno@v1
        with:
-          deno-version: v1.x
+          deno-version: v2.x

      - name: Compile all platform binaries
        run: bash scripts/compile-all.sh
--- a/.gitea/workflows/npm-publish.yml
+++ b/.gitea/workflows/npm-publish.yml
@@ -0,0 +1,129 @@
+name: Publish to npm
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  npm-publish:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Deno
+        uses: denoland/setup-deno@v1
+        with:
+          deno-version: v2.x
+
+      - name: Setup Node.js for npm publishing
+        uses: actions/setup-node@v4
+        with:
+          node-version: '18.x'
+          registry-url: 'https://registry.npmjs.org/'
+
+      - name: Get version from tag
+        id: version
+        run: |
+          VERSION=${GITHUB_REF#refs/tags/}
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+          echo "version_number=${VERSION#v}" >> $GITHUB_OUTPUT
+          echo "Publishing version: $VERSION"
+
+      - name: Verify deno.json version matches tag
+        run: |
+          DENO_VERSION=$(grep -o '"version": "[^"]*"' deno.json | cut -d'"' -f4)
+          TAG_VERSION="${{ steps.version.outputs.version_number }}"
+          echo "deno.json version: $DENO_VERSION"
+          echo "Tag version: $TAG_VERSION"
+          if [ "$DENO_VERSION" != "$TAG_VERSION" ]; then
+            echo "ERROR: Version mismatch!"
+            echo "deno.json has version $DENO_VERSION but tag is $TAG_VERSION"
+            exit 1
+          fi
+
+      - name: Compile binaries for npm package
+        run: |
+          echo "Compiling binaries for npm package..."
+          deno task compile
+          echo ""
+          echo "Binary sizes:"
+          ls -lh dist/binaries/
+
+      - name: Generate SHA256 checksums
+        run: |
+          cd dist/binaries
+          sha256sum * > SHA256SUMS
+          cat SHA256SUMS
+          cd ../..
+
+      - name: Sync package.json version
+        run: |
+          VERSION="${{ steps.version.outputs.version_number }}"
+          echo "Syncing package.json to version ${VERSION}..."
+          npm version ${VERSION} --no-git-tag-version --allow-same-version
+          echo "package.json version: $(grep '"version"' package.json | head -1)"
+
+      - name: Create npm package
+        run: |
+          echo "Creating npm package..."
+          npm pack
+          echo ""
+          echo "Package created:"
+          ls -lh *.tgz
+
+      - name: Test local installation
+        run: |
+          echo "Testing local package installation..."
+          PACKAGE_FILE=$(ls *.tgz)
+          npm install -g ${PACKAGE_FILE}
+          echo ""
+          echo "Testing nupst command:"
+          nupst --version || echo "Note: Binary execution may fail in CI environment"
+          echo ""
+          echo "Checking installed files:"
+          npm ls -g @serve.zone/nupst || true
+
+      - name: Publish to npm
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+        run: |
+          echo "Publishing to npm registry..."
+          npm publish --access public
+          echo ""
+          echo "✅ Successfully published @serve.zone/nupst to npm!"
+          echo ""
+          echo "Package info:"
+          npm view @serve.zone/nupst
+
+      - name: Verify npm package
+        run: |
+          echo "Waiting for npm propagation..."
+          sleep 30
+          echo ""
+          echo "Verifying published package..."
+          npm view @serve.zone/nupst
+          echo ""
+          echo "Testing installation from npm:"
+          npm install -g @serve.zone/nupst
+          echo ""
+          echo "Package installed successfully!"
+          which nupst || echo "Binary location check skipped"
+
+      - name: Publish Summary
+        run: |
+          echo "================================================"
+          echo "  npm Publish Complete!"
+          echo "================================================"
+          echo ""
+          echo "✅ Package: @serve.zone/nupst"
+          echo "✅ Version: ${{ steps.version.outputs.version }}"
+          echo ""
+          echo "Installation:"
+          echo "  npm install -g @serve.zone/nupst"
+          echo ""
+          echo "Registry:"
+          echo "  https://www.npmjs.com/package/@serve.zone/nupst"
+          echo ""
--- a/.gitea/workflows/release.yml
+++ b/.gitea/workflows/release.yml
@@ -18,7 +18,7 @@ jobs:
      - name: Set up Deno
        uses: denoland/setup-deno@v1
        with:
-          deno-version: v1.x
+          deno-version: v2.x

      - name: Get version from tag
        id: version
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,19 @@
 # Changelog

+## 2025-10-23 - 5.1.2 - fix(scripts)
+Add build script to package.json and include local dev tool settings
+
+- Add a 'build' script to package.json (no-op placeholder) to provide an explicit build step
+- Minor scripts section formatting tidy in package.json
+- Add a hidden local settings file for development tooling permissions to the repository (local-only configuration)
+
+## 2025-10-23 - 5.1.1 - fix(tooling)
+Add .claude/settings.local.json with local automation permissions
+
+- Add .claude/settings.local.json to specify allowed permissions for local automated tasks
+- Grants permissions for various developer/CI actions (deno check/lint/fmt, npm/npm pack, selective Bash commands, WebFetch to docs.deno.com and code.foss.global, and file/read/replace helpers)
+- This is a developer/local tooling config only and does not change runtime code or package behavior
+
 ## 2025-10-22 - 5.1.0 - feat(packaging)
 Add npm packaging and installer: wrapper, postinstall downloader, publish workflow, and packaging files

--- a/deno.json
+++ b/deno.json
@@ -1,7 +1,8 @@
 {
  "name": "@serve.zone/nupst",
-  "version": "5.0.5",
+  "version": "5.1.6",
  "exports": "./mod.ts",
+  "nodeModulesDir": "auto",
  "tasks": {
    "dev": "deno run --allow-all mod.ts",
    "compile": "deno task compile:all",
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
  "name": "@serve.zone/nupst",
-  "version": "5.1.0",
+  "version": "5.1.6",
  "description": "Network UPS Shutdown Tool - Monitor SNMP-enabled UPS devices and orchestrate graceful system shutdowns during power emergencies",
  "keywords": [
    "ups",
@@ -34,7 +34,8 @@
  "scripts": {
    "postinstall": "node scripts/install-binary.js",
    "prepublishOnly": "echo 'Publishing NUPST binaries to npm...'",
-    "test": "echo 'Tests are run with Deno: deno task test'"
+    "test": "echo 'Tests are run with Deno: deno task test'",
+    "build": "echo 'no build needed'"
  },
  "files": [
    "bin/",
@@ -58,5 +59,6 @@
  "publishConfig": {
    "access": "public",
    "registry": "https://registry.npmjs.org/"
-  }
+  },
+  "packageManager": "pnpm@10.18.1+sha512.77a884a165cbba2d8d1c19e3b4880eee6d2fcabd0d879121e282196b80042351d5eb3ca0935fa599da1dc51265cc68816ad2bddd2a2de5ea9fdf92adbec7cd34"
 }
--- a/readme.md
+++ b/readme.md
@@ -1,8 +1,12 @@
 # ⚡ NUPST - Network UPS Shutdown Tool

-**Keep your systems safe when the power goes out.** NUPST is a lightweight, battle-tested command-line tool that monitors SNMP-enabled UPS devices and orchestrates graceful system shutdowns during power emergencies. Distributed as self-contained binaries with zero runtime dependencies for maximum reliability.
+**Keep your systems safe when the power goes out.** NUPST is a lightweight, battle-tested
+command-line tool that monitors SNMP-enabled UPS devices and orchestrates graceful system shutdowns
+during power emergencies. Distributed as self-contained binaries with zero runtime dependencies for
+maximum reliability.

-**Version 5.0+** is powered by Deno and distributed as single pre-compiled binaries—no installation, no setup, just run.
+**Version 5.0+** is powered by Deno and distributed as single pre-compiled binaries—no installation,
+no setup, just run.

 ## ✨ Features

@@ -15,12 +19,18 @@
  - Runtime threshold triggers
  - Power status change triggers
  - Configurable shutdown delays
- **🌐 Universal SNMP Support**: Full support for SNMP v1, v2c, and v3 with authentication and encryption
- **🏭 Multiple UPS Brands**: Works with CyberPower, APC, Eaton, TrippLite, Liebert/Vertiv, and custom OID configurations
+- **🌐 Universal SNMP Support**: Full support for SNMP v1, v2c, and v3 with authentication and
+  encryption
+- **🏭 Multiple UPS Brands**: Works with CyberPower, APC, Eaton, TrippLite, Liebert/Vertiv, and
+  custom OID configurations
 - **🚀 Systemd Integration**: Simple service installation and management
 - **📊 Real-time Monitoring**: Live status updates with detailed action and group information
- **📦 Self-Contained Binary**: Single executable with zero runtime dependencies—just download and run
- **🖥️ Cross-Platform**: Binaries available for Linux (x64, ARM64), macOS (Intel, Apple Silicon), and Windows
+- **🌐 HTTP API**: Optional HTTP server for JSON status export with authentication
+- **⚡ Power Metrics**: Monitor output load, power (watts), voltage, and current for all UPS devices
+- **📦 Self-Contained Binary**: Single executable with zero runtime dependencies—just download and
+  run
+- **🖥️ Cross-Platform**: Binaries available for Linux (x64, ARM64), macOS (Intel, Apple Silicon),
+  and Windows

 ## 🚀 Quick Start

@@ -61,13 +71,15 @@ npm install -g @serve.zone/nupst
 ```

 **Benefits:**
+
 - Automatic platform detection and binary download
 - Downloads only the binary for your platform (~400-500MB)
 - Easy updates via `npm update -g @serve.zone/nupst`
 - Version management with npm
 - Works with Node.js >=14

-**Note:** The installation will download the appropriate binary from GitHub releases during the postinstall step.
+**Note:** The installation will download the appropriate binary from GitHub releases during the
+postinstall step.

 ### Automated Installer Script

@@ -78,6 +90,7 @@ curl -sSL https://code.foss.global/serve.zone/nupst/raw/branch/main/install.sh |
 ```

 **What it does:**
+
 1. Detects your platform (OS and architecture)
 2. Downloads the latest pre-compiled binary
 3. Installs to `/opt/nupst/nupst`
@@ -101,15 +114,16 @@ curl -sSL https://code.foss.global/serve.zone/nupst/raw/branch/main/install.sh |

 ### Manual Installation

-Download the appropriate binary for your platform from [releases](https://code.foss.global/serve.zone/nupst/releases):
+Download the appropriate binary for your platform from
+[releases](https://code.foss.global/serve.zone/nupst/releases):

-| Platform | Binary |
-|----------|--------|
-| Linux x64 | `nupst-linux-x64` |
-| Linux ARM64 | `nupst-linux-arm64` |
-| macOS Intel | `nupst-macos-x64` |
-| macOS Apple Silicon | `nupst-macos-arm64` |
-| Windows x64 | `nupst-windows-x64.exe` |
+| Platform            | Binary                  |
+| ------------------- | ----------------------- |
+| Linux x64           | `nupst-linux-x64`       |
+| Linux ARM64         | `nupst-linux-arm64`     |
+| macOS Intel         | `nupst-macos-x64`       |
+| macOS Apple Silicon | `nupst-macos-arm64`     |
+| Windows x64         | `nupst-windows-x64.exe` |

 ```bash
 # Download binary (replace with your platform)
@@ -175,7 +189,8 @@ nupst group list          # List all groups

 ### Action Management 🆕

-Actions define what happens when UPS conditions are met. Actions can be attached to individual UPS devices or to groups.
+Actions define what happens when UPS conditions are met. Actions can be attached to individual UPS
+devices or to groups.

 ```bash
 # Add an action to a UPS device or group
@@ -215,6 +230,78 @@ Add Action to UPS Main Server UPS
  Changes saved and will be applied automatically
 ```

+### Feature Management 🆕
+
+Optional features like the HTTP server for JSON status export:
+
+```bash
+# Configure HTTP server feature (interactive)
+nupst feature httpServer
+```
+
+**Example: Enabling HTTP Server**
+
+```bash
+$ sudo nupst feature httpServer
+
+HTTP Server Feature Configuration
+Configure the HTTP server to expose UPS status as JSON
+
+HTTP Server is currently: DISABLED
+
+Enable or disable HTTP server? (enable/disable/cancel): enable
+
+HTTP Server Port [8080]: 8080
+URL Path [/ups-status]: /ups-status
+Generated new authentication token
+
+✓ HTTP Server Configuration
+
+  Status: ENABLED
+  Port: 8080
+  Path: /ups-status
+  Auth Token: abc123xyz789def456
+
+  Usage examples:
+    curl -H "Authorization: Bearer abc123xyz789def456" http://localhost:8080/ups-status
+    curl "http://localhost:8080/ups-status?token=abc123xyz789def456"
+
+⚠ IMPORTANT: Save the authentication token securely!
+
+Service is running. Restart to apply changes? (Y/n): Y
+```
+
+**Query UPS Status via HTTP:**
+
+```bash
+# Using Bearer token in header
+curl -H "Authorization: Bearer abc123xyz789def456" \
+  http://localhost:8080/ups-status
+
+# Using token as query parameter
+curl "http://localhost:8080/ups-status?token=abc123xyz789def456"
+```
+
+**JSON Response:**
+
+```json
+[
+  {
+    "id": "ups-main",
+    "name": "Main Server UPS",
+    "powerStatus": "online",
+    "batteryCapacity": 100,
+    "batteryRuntime": 45,
+    "outputLoad": 23,
+    "outputPower": 115,
+    "outputVoltage": 230.5,
+    "outputCurrent": 0.5,
+    "lastStatusChange": 1729685123456,
+    "lastCheckTime": 1729685153456
+  }
+]
+```
+
 ### Configuration

 ```bash
@@ -231,14 +318,21 @@ nupst config show         # Display current configuration

 ## ⚙️ Configuration

-NUPST stores configuration at `/etc/nupst/config.json`. The easiest way to configure is through interactive commands, but you can also edit the JSON directly.
+NUPST stores configuration at `/etc/nupst/config.json`. The easiest way to configure is through
+interactive commands, but you can also edit the JSON directly.

 ### Example Configuration (v4.1+)

 ```json
 {
-  "version": "4.1",
+  "version": "4.2",
  "checkInterval": 30000,
+  "httpServer": {
+    "enabled": true,
+    "port": 8080,
+    "path": "/ups-status",
+    "authToken": "abc123xyz789def456"
+  },
  "upsDevices": [
    {
      "id": "ups-main",
@@ -315,8 +409,9 @@ NUPST stores configuration at `/etc/nupst/config.json`. The easiest way to confi

 #### Global Settings

- **`version`**: Config format version (current: "4.1")
+- **`version`**: Config format version (current: "4.2")
 - **`checkInterval`**: Polling interval in milliseconds (default: 30000)
+- **`httpServer`**: Optional HTTP server configuration (see HTTP Server Configuration below)

 #### UPS Device Settings

@@ -327,25 +422,25 @@ NUPST stores configuration at `/etc/nupst/config.json`. The easiest way to confi

 **SNMP Configuration:**

-| Field | Description | Values |
-|-------|-------------|--------|
-| `host` | IP address or hostname | e.g., "192.168.1.100" |
-| `port` | SNMP port | Default: 161 |
-| `version` | SNMP version | 1, 2, or 3 |
-| `timeout` | Timeout in milliseconds | Default: 5000 |
-| `upsModel` | UPS brand/model | 'cyberpower', 'apc', 'eaton', 'tripplite', 'liebert', 'custom' |
-| `community` | SNMP community (v1/v2c) | Default: "public" |
+| Field       | Description             | Values                                                         |
+| ----------- | ----------------------- | -------------------------------------------------------------- |
+| `host`      | IP address or hostname  | e.g., "192.168.1.100"                                          |
+| `port`      | SNMP port               | Default: 161                                                   |
+| `version`   | SNMP version            | 1, 2, or 3                                                     |
+| `timeout`   | Timeout in milliseconds | Default: 5000                                                  |
+| `upsModel`  | UPS brand/model         | 'cyberpower', 'apc', 'eaton', 'tripplite', 'liebert', 'custom' |
+| `community` | SNMP community (v1/v2c) | Default: "public"                                              |

 **SNMPv3 Security:**

-| Field | Description |
-|-------|-------------|
+| Field           | Description                                 |
+| --------------- | ------------------------------------------- |
 | `securityLevel` | 'noAuthNoPriv', 'authNoPriv', or 'authPriv' |
-| `username` | SNMPv3 username |
-| `authProtocol` | 'MD5' or 'SHA' |
-| `authKey` | Authentication password |
-| `privProtocol` | 'DES' or 'AES' (for authPriv) |
-| `privKey` | Privacy/encryption password |
+| `username`      | SNMPv3 username                             |
+| `authProtocol`  | 'MD5' or 'SHA'                              |
+| `authKey`       | Authentication password                     |
+| `privProtocol`  | 'DES' or 'AES' (for authPriv)               |
+| `privKey`       | Privacy/encryption password                 |

 #### Action Configuration

@@ -365,21 +460,21 @@ Actions define automated responses to UPS conditions:

 **Action Fields:**

-| Field | Description | Values |
-|-------|-------------|--------|
-| `type` | Action type | Currently only 'shutdown' |
-| `thresholds` | Battery and runtime limits | `{ battery: 0-100, runtime: minutes }` |
-| `triggerMode` | When to trigger action | See Trigger Modes below |
-| `shutdownDelay` | Delay before executing (seconds) | Default: 5 |
+| Field           | Description                      | Values                                 |
+| --------------- | -------------------------------- | -------------------------------------- |
+| `type`          | Action type                      | Currently only 'shutdown'              |
+| `thresholds`    | Battery and runtime limits       | `{ battery: 0-100, runtime: minutes }` |
+| `triggerMode`   | When to trigger action           | See Trigger Modes below                |
+| `shutdownDelay` | Delay before executing (seconds) | Default: 5                             |

 **Trigger Modes:**

-| Mode | Description |
-|------|-------------|
-| `onlyPowerChanges` | Trigger only when power status changes (on battery → online or vice versa) |
-| `onlyThresholds` | Trigger only when battery or runtime thresholds are violated |
-| `powerChangesAndThresholds` | Trigger only when power changes AND thresholds are violated |
-| `anyChange` | Trigger on any status change |
+| Mode                        | Description                                                                |
+| --------------------------- | -------------------------------------------------------------------------- |
+| `onlyPowerChanges`          | Trigger only when power status changes (on battery → online or vice versa) |
+| `onlyThresholds`            | Trigger only when battery or runtime thresholds are violated               |
+| `powerChangesAndThresholds` | Trigger only when power changes AND thresholds are violated                |
+| `anyChange`                 | Trigger on any status change                                               |

 #### Group Settings

@@ -397,8 +492,53 @@ Groups allow coordinated management of multiple UPS devices:

 **Group Modes:**

- **`redundant`**: System shuts down only when ALL UPS devices in the group are critical. Perfect for setups with backup UPS units.
- **`nonRedundant`**: System shuts down when ANY UPS device in the group is critical. Used when all UPS devices must be operational.
+- **`redundant`**: System shuts down only when ALL UPS devices in the group are critical. Perfect
+  for setups with backup UPS units.
+- **`nonRedundant`**: System shuts down when ANY UPS device in the group is critical. Used when all
+  UPS devices must be operational.
+
+#### HTTP Server Configuration 🆕
+
+Enable optional HTTP server for JSON status export with authentication:
+
+```json
+{
+  "enabled": true,
+  "port": 8080,
+  "path": "/ups-status",
+  "authToken": "abc123xyz789def456"
+}
+```
+
+**HTTP Server Fields:**
+
+| Field       | Description                                      | Default        |
+| ----------- | ------------------------------------------------ | -------------- |
+| `enabled`   | Whether HTTP server is enabled                   | `false`        |
+| `port`      | TCP port for HTTP server                         | `8080`         |
+| `path`      | URL path for status endpoint                     | `/ups-status`  |
+| `authToken` | Authentication token (required for all requests) | Auto-generated |
+
+**Authentication Methods:**
+
+The HTTP server supports two authentication methods:
+
+1. **Bearer Token** (Header): `Authorization: Bearer <token>`
+2. **Query Parameter**: `?token=<token>`
+
+**Security Features:**
+
+- Token-based authentication required for all requests
+- Returns 401 Unauthorized for invalid/missing tokens
+- Serves cached data from monitoring loop (no extra SNMP queries)
+- No CORS headers (local network only)
+
+**Use Cases:**
+
+- Integration with monitoring systems (Prometheus, Grafana, etc.)
+- Custom dashboards and visualizations
+- Mobile apps and web interfaces
+- Home automation systems

 ### Supported UPS Models

@@ -425,7 +565,8 @@ For custom UPS models, specify `customOIDs`:

 ### Status Display

-The status command shows comprehensive information about your UPS devices, groups, and configured actions:
+The status command shows comprehensive information about your UPS devices, groups, and configured
+actions:

 ```bash
 $ nupst service status
@@ -457,6 +598,7 @@ nupst service logs
 ```

 Example output:
+
 ```
 [2025-01-15 10:30:15] ℹ NUPST daemon started
 [2025-01-15 10:30:15] ✓ Connected to Main Server UPS (192.168.1.100)
@@ -481,11 +623,11 @@ NUPST is designed with security as a priority:

 Full SNMPv3 support with authentication and encryption:

-| Security Level | Description |
-|----------------|-------------|
-| `noAuthNoPriv` | No authentication, no encryption (not recommended) |
-| `authNoPriv` | MD5/SHA authentication without encryption |
-| `authPriv` | Full authentication + DES/AES encryption (recommended) |
+| Security Level | Description                                            |
+| -------------- | ------------------------------------------------------ |
+| `noAuthNoPriv` | No authentication, no encryption (not recommended)     |
+| `authNoPriv`   | MD5/SHA authentication without encryption              |
+| `authPriv`     | Full authentication + DES/AES encryption (recommended) |

 **Example SNMPv3 Configuration:**

@@ -506,6 +648,12 @@ Full SNMPv3 support with authentication and encryption:
 - **Local-Only Communication**: Only connects to UPS devices on local network
 - **No Telemetry**: No data sent to external servers
 - **No Auto-Updates**: Manual update process only
+- **HTTP Server** (optional):
+  - Disabled by default
+  - Token-based authentication required
+  - Local network access only (no CORS)
+  - Serves cached data (no additional SNMP queries)
+  - Configurable port and path

 ### Verifying Downloads

@@ -531,6 +679,7 @@ curl -sSL https://code.foss.global/serve.zone/nupst/raw/branch/main/install.sh |
 ```

 The installer will:
+
 - Download the latest binary
 - Replace the existing installation
 - Preserve your configuration
@@ -557,7 +706,8 @@ sudo nupst service start
 nupst --version
 ```

-Visit the [releases page](https://code.foss.global/serve.zone/nupst/releases) for the latest version.
+Visit the [releases page](https://code.foss.global/serve.zone/nupst/releases) for the latest
+version.

 ## 🗑️ Uninstallation

@@ -655,11 +805,11 @@ When installed, NUPST makes the following changes:

 ### File System

-| Path | Description |
-|------|-------------|
-| `/opt/nupst/nupst` | Pre-compiled binary |
-| `/usr/local/bin/nupst` | Symlink to binary |
-| `/etc/nupst/config.json` | Configuration file |
+| Path                                | Description          |
+| ----------------------------------- | -------------------- |
+| `/opt/nupst/nupst`                  | Pre-compiled binary  |
+| `/usr/local/bin/nupst`              | Symlink to binary    |
+| `/etc/nupst/config.json`            | Configuration file   |
 | `/etc/systemd/system/nupst.service` | Systemd service unit |

 ### Services
@@ -670,7 +820,7 @@ When installed, NUPST makes the following changes:
 ### Network

 - Outbound SNMP to UPS devices (default port 161)
- No inbound connections required
+- Optional inbound HTTP server (disabled by default, configurable port)
 - No external internet connections

 ## 🚀 Migration from v3.x
@@ -683,6 +833,7 @@ curl -sSL https://code.foss.global/serve.zone/nupst/raw/branch/main/install.sh |
 ```

 **The installer automatically:**
+
 - Detects v3.x installation
 - Stops the service
 - Replaces Node.js version with Deno binary
@@ -691,21 +842,22 @@ curl -sSL https://code.foss.global/serve.zone/nupst/raw/branch/main/install.sh |

 ### Key Changes in v4.x

-| Aspect | v3.x | v4.x |
-|--------|------|------|
-| **Runtime** | Node.js + npm | Deno |
-| **Distribution** | Git repo + npm install | Pre-compiled binaries |
-| **Runtime Dependencies** | node_modules required | Zero (self-contained) |
-| **Size** | ~150MB (with node_modules) | ~80MB (single binary) |
-| **Startup** | Seconds | Milliseconds |
-| **Commands** | Flat (`nupst add`) | Subcommands (`nupst ups add`) |
-| **Configuration** | UPS-level thresholds | Action-based thresholds |
+| Aspect                   | v3.x                       | v4.x                          |
+| ------------------------ | -------------------------- | ----------------------------- |
+| **Runtime**              | Node.js + npm              | Deno                          |
+| **Distribution**         | Git repo + npm install     | Pre-compiled binaries         |
+| **Runtime Dependencies** | node_modules required      | Zero (self-contained)         |
+| **Size**                 | ~150MB (with node_modules) | ~80MB (single binary)         |
+| **Startup**              | Seconds                    | Milliseconds                  |
+| **Commands**             | Flat (`nupst add`)         | Subcommands (`nupst ups add`) |
+| **Configuration**        | UPS-level thresholds       | Action-based thresholds       |

 ### Configuration Compatibility

 Your v3.x configuration is **fully compatible**. The migration system automatically converts:

 **v4.0 format** (UPS-level thresholds):
+
 ```json
 {
  "version": "4.0",
@@ -717,6 +869,7 @@ Your v3.x configuration is **fully compatible**. The migration system automatica
 ```

 **v4.1 format** (action-based thresholds):
+
 ```json
 {
  "version": "4.1",
@@ -788,19 +941,28 @@ nupst/

 ## License and Legal Information

-This repository contains open-source code that is licensed under the MIT License. A copy of the MIT License can be found in the [license](license) file within this repository.
+This repository contains open-source code that is licensed under the MIT License. A copy of the MIT
+License can be found in the [license](license) file within this repository.

-**Please note:** The MIT License does not grant permission to use the trade names, trademarks, service marks, or product names of the project, except as required for reasonable and customary use in describing the origin of the work and reproducing the content of the NOTICE file.
+**Please note:** The MIT License does not grant permission to use the trade names, trademarks,
+service marks, or product names of the project, except as required for reasonable and customary use
+in describing the origin of the work and reproducing the content of the NOTICE file.

 ### Trademarks

-This project is owned and maintained by Task Venture Capital GmbH. The names and logos associated with Task Venture Capital GmbH and any related products or services are trademarks of Task Venture Capital GmbH and are not included within the scope of the MIT license granted herein. Use of these trademarks must comply with Task Venture Capital GmbH's Trademark Guidelines, and any usage must be approved in writing by Task Venture Capital GmbH.
+This project is owned and maintained by Task Venture Capital GmbH. The names and logos associated
+with Task Venture Capital GmbH and any related products or services are trademarks of Task Venture
+Capital GmbH and are not included within the scope of the MIT license granted herein. Use of these
+trademarks must comply with Task Venture Capital GmbH's Trademark Guidelines, and any usage must be
+approved in writing by Task Venture Capital GmbH.

 ### Company Information

-Task Venture Capital GmbH
-Registered at District court Bremen HRB 35230 HB, Germany
+Task Venture Capital GmbH Registered at District court Bremen HRB 35230 HB, Germany

-For any legal inquiries or if you require further information, please contact us via email at hello@task.vc.
+For any legal inquiries or if you require further information, please contact us via email at
+hello@task.vc.

-By using this repository, you acknowledge that you have read this section, agree to comply with its terms, and understand that the licensing of the code does not imply endorsement by Task Venture Capital GmbH of any derivative works.
+By using this repository, you acknowledge that you have read this section, agree to comply with its
+terms, and understand that the licensing of the code does not imply endorsement by Task Venture
+Capital GmbH of any derivative works.
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
 */
 export const commitinfo = {
  name: '@serve.zone/nupst',
-  version: '5.1.0',
+  version: '5.1.2',
  description: 'Network UPS Shutdown Tool - Monitor SNMP-enabled UPS devices and orchestrate graceful system shutdowns during power emergencies'
 }
--- a/ts/cli.ts
+++ b/ts/cli.ts
@@ -223,6 +223,24 @@ export class NupstCli {
      return;
    }

+    // Handle feature subcommands
+    if (command === 'feature') {
+      const subcommand = commandArgs[0];
+      const featureHandler = this.nupst.getFeatureHandler();
+
+      switch (subcommand) {
+        case 'httpServer':
+        case 'http-server':
+        case 'http':
+          await featureHandler.configureHttpServer();
+          break;
+        default:
+          this.showFeatureHelp();
+          break;
+      }
+      return;
+    }
+
    // Handle config subcommand
    if (command === 'config') {
      const subcommand = commandArgs[0] || 'show';
@@ -294,6 +312,26 @@ export class NupstCli {
          `  ${theme.path('/etc/nupst/config.json')}`,
        ], 60, 'info');

+        // HTTP Server Status (if configured)
+        if (config.httpServer) {
+          const serverStatus = config.httpServer.enabled
+            ? theme.success('Enabled')
+            : theme.dim('Disabled');
+
+          logger.log('');
+          logger.logBox('HTTP Server', [
+            `Status: ${serverStatus}`,
+            ...(config.httpServer.enabled ? [
+              `Port: ${theme.highlight(String(config.httpServer.port))}`,
+              `Path: ${theme.highlight(config.httpServer.path)}`,
+              `Auth Token: ${theme.dim('***' + config.httpServer.authToken.slice(-4))}`,
+              '',
+              theme.dim('Usage:'),
+              `  curl -H "Authorization: Bearer TOKEN" http://localhost:${config.httpServer.port}${config.httpServer.path}`,
+            ] : []),
+          ], 70, config.httpServer.enabled ? 'success' : 'default');
+        }
+
        // UPS Devices Table
        if (config.upsDevices.length > 0) {
          const upsRows = config.upsDevices.map((ups) => ({
@@ -466,6 +504,7 @@ export class NupstCli {
    this.printCommand('ups <subcommand>', 'Manage UPS devices');
    this.printCommand('group <subcommand>', 'Manage UPS groups');
    this.printCommand('action <subcommand>', 'Manage UPS actions');
+    this.printCommand('feature <subcommand>', 'Manage optional features');
    this.printCommand('config [show]', 'Display current configuration');
    this.printCommand('update', 'Update NUPST from repository', theme.dim('(requires root)'));
    this.printCommand('uninstall', 'Completely remove NUPST', theme.dim('(requires root)'));
@@ -509,6 +548,11 @@ export class NupstCli {
    this.printCommand('nupst action list [target-id]', 'List all actions (optionally for specific target)');
    console.log('');

+    // Feature subcommands
+    logger.log(theme.info('Feature Subcommands:'));
+    this.printCommand('nupst feature httpServer', 'Configure HTTP server for JSON status export');
+    console.log('');
+
    // Options
    logger.log(theme.info('Options:'));
    this.printCommand('--debug, -d', 'Enable debug mode for detailed SNMP logging');
@@ -632,6 +676,21 @@ Examples:
  nupst action add default                - Add a new action to UPS or group 'default'
  nupst action remove default 0           - Remove action at index 0 from UPS or group 'default'
  nupst action add dc-rack-1              - Add a new action to group 'dc-rack-1'
+`);
+  }
+
+  private showFeatureHelp(): void {
+    logger.log(`
+NUPST - Feature Management Commands
+
+Usage:
+  nupst feature <subcommand>
+
+Subcommands:
+  httpServer              - Configure HTTP server for JSON status export
+
+Examples:
+  nupst feature httpServer    - Enable/disable HTTP server with interactive setup
 `);
  }
 }
--- a/ts/cli/feature-handler.ts
+++ b/ts/cli/feature-handler.ts
@@ -0,0 +1,213 @@
+import process from 'node:process';
+import { execSync } from 'node:child_process';
+import { Nupst } from '../nupst.ts';
+import { logger } from '../logger.ts';
+import { theme } from '../colors.ts';
+import * as helpers from '../helpers/index.ts';
+
+/**
+ * Class for handling feature-related CLI commands
+ * Provides interface for managing optional features like HTTP server
+ */
+export class FeatureHandler {
+  private readonly nupst: Nupst;
+
+  /**
+   * Create a new feature handler
+   * @param nupst Reference to the main Nupst instance
+   */
+  constructor(nupst: Nupst) {
+    this.nupst = nupst;
+  }
+
+  /**
+   * Configure HTTP server feature
+   */
+  public async configureHttpServer(): Promise<void> {
+    try {
+      const readline = await import('node:readline');
+      const rl = readline.createInterface({
+        input: process.stdin,
+        output: process.stdout,
+      });
+
+      const prompt = (question: string): Promise<string> => {
+        return new Promise((resolve) => {
+          rl.question(question, (answer: string) => {
+            resolve(answer);
+          });
+        });
+      };
+
+      try {
+        await this.runHttpServerConfig(prompt);
+      } finally {
+        rl.close();
+        process.stdin.destroy();
+      }
+    } catch (error) {
+      logger.error(`HTTP Server config error: ${error instanceof Error ? error.message : String(error)}`);
+    }
+  }
+
+  /**
+   * Run the interactive HTTP server configuration process
+   * @param prompt Function to prompt for user input
+   */
+  private async runHttpServerConfig(prompt: (question: string) => Promise<string>): Promise<void> {
+    logger.log('');
+    logger.logBoxTitle('HTTP Server Feature Configuration', 60);
+    logger.logBoxLine('Configure the HTTP server to expose UPS status as JSON');
+    logger.logBoxEnd();
+    logger.log('');
+
+    // Load config
+    let config;
+    try {
+      await this.nupst.getDaemon().loadConfig();
+      config = this.nupst.getDaemon().getConfig();
+    } catch (error) {
+      logger.error('No configuration found. Please run "nupst ups add" first.');
+      return;
+    }
+
+    // Show current status
+    if (config.httpServer?.enabled) {
+      logger.info('HTTP Server is currently: ' + theme.success('ENABLED'));
+      logger.log(`  Port: ${theme.highlight(String(config.httpServer.port))}`);
+      logger.log(`  Path: ${theme.highlight(config.httpServer.path)}`);
+      logger.log(`  Auth Token: ${theme.dim('***' + config.httpServer.authToken.slice(-4))}`);
+      logger.log('');
+    } else {
+      logger.info('HTTP Server is currently: ' + theme.dim('DISABLED'));
+      logger.log('');
+    }
+
+    // Ask enable/disable
+    const action = await prompt('Enable or disable HTTP server? (enable/disable/cancel): ');
+
+    if (action.toLowerCase() === 'cancel' || action.toLowerCase() === 'c') {
+      logger.log('Cancelled.');
+      return;
+    }
+
+    if (action.toLowerCase() === 'disable' || action.toLowerCase() === 'd') {
+      // Disable HTTP server
+      config.httpServer = {
+        enabled: false,
+        port: config.httpServer?.port || 8080,
+        path: config.httpServer?.path || '/ups-status',
+        authToken: config.httpServer?.authToken || '',
+      };
+
+      this.nupst.getDaemon().saveConfig(config);
+
+      logger.log('');
+      logger.success('HTTP Server disabled');
+      logger.log('');
+
+      await this.restartServiceIfRunning();
+      return;
+    }
+
+    if (action.toLowerCase() !== 'enable' && action.toLowerCase() !== 'e') {
+      logger.error('Invalid option. Please enter "enable", "disable", or "cancel".');
+      return;
+    }
+
+    // Enable - gather configuration
+    logger.log('');
+
+    const portInput = await prompt(`HTTP Server Port [${config.httpServer?.port || 8080}]: `);
+    const port = portInput ? parseInt(portInput, 10) : (config.httpServer?.port || 8080);
+
+    if (isNaN(port) || port < 1 || port > 65535) {
+      logger.error('Invalid port number. Must be between 1 and 65535.');
+      return;
+    }
+
+    const pathInput = await prompt(`URL Path [${config.httpServer?.path || '/ups-status'}]: `);
+    const path = pathInput || config.httpServer?.path || '/ups-status';
+
+    // Ensure path starts with /
+    const finalPath = path.startsWith('/') ? path : `/${path}`;
+
+    // Generate or reuse auth token
+    let authToken = config.httpServer?.authToken;
+    if (!authToken) {
+      // Generate new random token
+      authToken = helpers.shortId() + helpers.shortId() + helpers.shortId();
+      logger.log('');
+      logger.info('Generated new authentication token');
+    } else {
+      const regenerate = await prompt('Regenerate authentication token? (y/N): ');
+      if (regenerate.toLowerCase() === 'y' || regenerate.toLowerCase() === 'yes') {
+        authToken = helpers.shortId() + helpers.shortId() + helpers.shortId();
+        logger.info('Generated new authentication token');
+      }
+    }
+
+    // Save configuration
+    config.httpServer = {
+      enabled: true,
+      port,
+      path: finalPath,
+      authToken,
+    };
+
+    this.nupst.getDaemon().saveConfig(config);
+
+    // Display summary
+    logger.log('');
+    logger.logBoxTitle('HTTP Server Configuration', 70, 'success');
+    logger.logBoxLine(`Status: ${theme.success('ENABLED')}`);
+    logger.logBoxLine(`Port: ${theme.highlight(String(port))}`);
+    logger.logBoxLine(`Path: ${theme.highlight(finalPath)}`);
+    logger.logBoxLine(`Auth Token: ${theme.warning(authToken)}`);
+    logger.logBoxLine('');
+    logger.logBoxLine(theme.dim('Usage examples:'));
+    logger.logBoxLine(`  curl -H "Authorization: Bearer ${authToken}" http://localhost:${port}${finalPath}`);
+    logger.logBoxLine(`  curl "http://localhost:${port}${finalPath}?token=${authToken}"`);
+    logger.logBoxEnd();
+    logger.log('');
+
+    logger.warn('IMPORTANT: Save the authentication token securely!');
+    logger.log('');
+
+    await this.restartServiceIfRunning();
+  }
+
+  /**
+   * Restart the service if it's currently running
+   */
+  private async restartServiceIfRunning(): Promise<void> {
+    try {
+      const isActive = execSync('systemctl is-active nupst.service || true').toString().trim() === 'active';
+
+      if (isActive) {
+        logger.log('');
+        const readline = await import('node:readline');
+        const rl = readline.createInterface({
+          input: process.stdin,
+          output: process.stdout,
+        });
+
+        const answer = await new Promise<string>((resolve) => {
+          rl.question('Service is running. Restart to apply changes? (Y/n): ', resolve);
+        });
+
+        rl.close();
+
+        if (!answer || answer.toLowerCase() === 'y' || answer.toLowerCase() === 'yes') {
+          logger.info('Restarting service...');
+          execSync('sudo systemctl restart nupst.service');
+          logger.success('Service restarted successfully');
+        } else {
+          logger.warn('Changes will take effect on next service restart');
+        }
+      }
+    } catch (error) {
+      // Ignore errors - service might not be installed
+    }
+  }
+}
--- a/ts/daemon.ts
+++ b/ts/daemon.ts
@@ -10,6 +10,7 @@ import { MigrationRunner } from './migrations/index.ts';
 import { theme, symbols, getBatteryColor, getRuntimeColor, formatPowerStatus } from './colors.ts';
 import type { IActionConfig } from './actions/base-action.ts';
 import { ActionManager, type IActionContext, type TPowerStatus } from './actions/index.ts';
+import { NupstHttpServer } from './http-server.ts';

 const execAsync = promisify(exec);
 const execFileAsync = promisify(execFile);
@@ -46,6 +47,20 @@ export interface IGroupConfig {
  actions?: IActionConfig[];
 }

+/**
+ * HTTP Server configuration interface
+ */
+export interface IHttpServerConfig {
+  /** Whether HTTP server is enabled */
+  enabled: boolean;
+  /** Port to listen on */
+  port: number;
+  /** URL path for the endpoint */
+  path: string;
+  /** Authentication token */
+  authToken: string;
+}
+
 /**
 * Configuration interface for the daemon
 */
@@ -58,6 +73,8 @@ export interface INupstConfig {
  groups: IGroupConfig[];
  /** Check interval in milliseconds */
  checkInterval: number;
+  /** HTTP Server configuration */
+  httpServer?: IHttpServerConfig;

  // Legacy fields for backward compatibility (will be migrated away)
  /** UPS list (v3 format - legacy) */
@@ -82,6 +99,10 @@ export interface IUpsStatus {
  powerStatus: 'online' | 'onBattery' | 'unknown';
  batteryCapacity: number;
  batteryRuntime: number;
+  outputLoad: number;        // Load percentage (0-100%)
+  outputPower: number;        // Power in watts
+  outputVoltage: number;      // Voltage in volts
+  outputCurrent: number;      // Current in amps
  lastStatusChange: number;
  lastCheckTime: number;
 }
@@ -139,6 +160,7 @@ export class NupstDaemon {
  private snmp: NupstSnmp;
  private isRunning: boolean = false;
  private upsStatus: Map<string, IUpsStatus> = new Map();
+  private httpServer?: NupstHttpServer;

  /**
   * Create a new daemon instance with the given SNMP manager
@@ -278,6 +300,21 @@ export class NupstDaemon {
      // Initialize UPS status tracking
      this.initializeUpsStatus();

+      // Start HTTP server if configured
+      if (this.config.httpServer?.enabled && this.config.httpServer.authToken) {
+        try {
+          this.httpServer = new NupstHttpServer(
+            this.config.httpServer.port,
+            this.config.httpServer.path,
+            this.config.httpServer.authToken,
+            () => this.upsStatus
+          );
+          this.httpServer.start();
+        } catch (error) {
+          logger.error(`Failed to start HTTP server: ${error instanceof Error ? error.message : String(error)}`);
+        }
+      }
+
      // Start UPS monitoring
      this.isRunning = true;
      await this.monitor();
@@ -304,6 +341,10 @@ export class NupstDaemon {
          powerStatus: 'unknown',
          batteryCapacity: 100,
          batteryRuntime: 999, // High value as default
+          outputLoad: 0,
+          outputPower: 0,
+          outputVoltage: 0,
+          outputCurrent: 0,
          lastStatusChange: Date.now(),
          lastCheckTime: 0,
        });
@@ -377,6 +418,12 @@ export class NupstDaemon {
   */
  public stop(): void {
    logger.log('Stopping NUPST daemon...');
+
+    // Stop HTTP server if running
+    if (this.httpServer) {
+      this.httpServer.stop();
+    }
+
    this.isRunning = false;
  }

@@ -437,6 +484,10 @@ export class NupstDaemon {
            powerStatus: 'unknown',
            batteryCapacity: 100,
            batteryRuntime: 999,
+            outputLoad: 0,
+            outputPower: 0,
+            outputVoltage: 0,
+            outputCurrent: 0,
            lastStatusChange: Date.now(),
            lastCheckTime: 0,
          });
@@ -456,6 +507,10 @@ export class NupstDaemon {
          powerStatus: status.powerStatus,
          batteryCapacity: status.batteryCapacity,
          batteryRuntime: status.batteryRuntime,
+          outputLoad: status.outputLoad,
+          outputPower: status.outputPower,
+          outputVoltage: status.outputVoltage,
+          outputCurrent: status.outputCurrent,
          lastCheckTime: currentTime,
          lastStatusChange: currentStatus?.lastStatusChange || currentTime,
        };
--- a/ts/http-server.ts
+++ b/ts/http-server.ts
@@ -0,0 +1,113 @@
+import * as http from 'node:http';
+import { URL } from 'node:url';
+import { logger } from './logger.ts';
+import type { IUpsStatus } from './daemon.ts';
+
+/**
+ * HTTP Server for exposing UPS status as JSON
+ * Serves cached data from the daemon's monitoring loop
+ */
+export class NupstHttpServer {
+  private server?: http.Server;
+  private port: number;
+  private path: string;
+  private authToken: string;
+  private getUpsStatus: () => Map<string, IUpsStatus>;
+
+  /**
+   * Create a new HTTP server instance
+   * @param port Port to listen on
+   * @param path URL path for the endpoint
+   * @param authToken Authentication token required for access
+   * @param getUpsStatus Function to retrieve cached UPS status
+   */
+  constructor(
+    port: number,
+    path: string,
+    authToken: string,
+    getUpsStatus: () => Map<string, IUpsStatus>
+  ) {
+    this.port = port;
+    this.path = path;
+    this.authToken = authToken;
+    this.getUpsStatus = getUpsStatus;
+  }
+
+  /**
+   * Verify authentication token from request
+   * Supports both Bearer token in Authorization header and token query parameter
+   * @param req HTTP request
+   * @returns True if authenticated, false otherwise
+   */
+  private isAuthenticated(req: http.IncomingMessage): boolean {
+    // Check Authorization header (Bearer token)
+    const authHeader = req.headers.authorization;
+    if (authHeader?.startsWith('Bearer ')) {
+      const token = authHeader.substring(7);
+      return token === this.authToken;
+    }
+
+    // Check token query parameter
+    if (req.url) {
+      const url = new URL(req.url, `http://localhost:${this.port}`);
+      const tokenParam = url.searchParams.get('token');
+      return tokenParam === this.authToken;
+    }
+
+    return false;
+  }
+
+  /**
+   * Start the HTTP server
+   */
+  public start(): void {
+    this.server = http.createServer((req, res) => {
+      // Parse URL
+      const reqUrl = new URL(req.url || '/', `http://localhost:${this.port}`);
+
+      if (reqUrl.pathname === this.path && req.method === 'GET') {
+        // Check authentication
+        if (!this.isAuthenticated(req)) {
+          res.writeHead(401, {
+            'Content-Type': 'application/json',
+            'WWW-Authenticate': 'Bearer'
+          });
+          res.end(JSON.stringify({ error: 'Unauthorized' }));
+          return;
+        }
+
+        // Get cached status (no refresh)
+        const statusMap = this.getUpsStatus();
+        const statusArray = Array.from(statusMap.values());
+
+        res.writeHead(200, {
+          'Content-Type': 'application/json',
+          'Cache-Control': 'no-cache'
+        });
+        res.end(JSON.stringify(statusArray, null, 2));
+      } else {
+        res.writeHead(404, { 'Content-Type': 'application/json' });
+        res.end(JSON.stringify({ error: 'Not Found' }));
+      }
+    });
+
+    this.server.listen(this.port, () => {
+      logger.success(`HTTP server started on port ${this.port} at ${this.path}`);
+    });
+
+    this.server.on('error', (error: any) => {
+      logger.error(`HTTP server error: ${error.message}`);
+    });
+  }
+
+  /**
+   * Stop the HTTP server
+   */
+  public stop(): void {
+    if (this.server) {
+      this.server.close(() => {
+        logger.log('HTTP server stopped');
+      });
+    }
+  }
+}
--- a/ts/nupst.ts
+++ b/ts/nupst.ts
@@ -7,6 +7,7 @@ import { UpsHandler } from './cli/ups-handler.ts';
 import { GroupHandler } from './cli/group-handler.ts';
 import { ServiceHandler } from './cli/service-handler.ts';
 import { ActionHandler } from './cli/action-handler.ts';
+import { FeatureHandler } from './cli/feature-handler.ts';
 import * as https from 'node:https';

 /**
@@ -21,6 +22,7 @@ export class Nupst {
  private readonly groupHandler: GroupHandler;
  private readonly serviceHandler: ServiceHandler;
  private readonly actionHandler: ActionHandler;
+  private readonly featureHandler: FeatureHandler;
  private updateAvailable: boolean = false;
  private latestVersion: string = '';

@@ -39,6 +41,7 @@ export class Nupst {
    this.groupHandler = new GroupHandler(this);
    this.serviceHandler = new ServiceHandler(this);
    this.actionHandler = new ActionHandler(this);
+    this.featureHandler = new FeatureHandler(this);
  }

  /**
@@ -90,6 +93,13 @@ export class Nupst {
    return this.actionHandler;
  }

+  /**
+   * Get the Feature handler for feature management
+   */
+  public getFeatureHandler(): FeatureHandler {
+    return this.featureHandler;
+  }
+
  /**
   * Get the current version of NUPST
   * @returns The current version string
--- a/ts/snmp/manager.ts
+++ b/ts/snmp/manager.ts
@@ -1,4 +1,4 @@
-import * as snmp from 'npm:net-snmp@3.20.0';
+import * as snmp from 'npm:net-snmp@3.26.0';
 import { Buffer } from 'node:buffer';
 import type { IOidSet, ISnmpConfig, IUpsStatus, TUpsModel } from './types.ts';
 import { UpsOidSets } from './oid-sets.ts';
@@ -304,6 +304,10 @@ export class NupstSnmp {
        console.log('  Power Status:', this.activeOIDs.POWER_STATUS);
        console.log('  Battery Capacity:', this.activeOIDs.BATTERY_CAPACITY);
        console.log('  Battery Runtime:', this.activeOIDs.BATTERY_RUNTIME);
+        console.log('  Output Load:', this.activeOIDs.OUTPUT_LOAD);
+        console.log('  Output Power:', this.activeOIDs.OUTPUT_POWER);
+        console.log('  Output Voltage:', this.activeOIDs.OUTPUT_VOLTAGE);
+        console.log('  Output Current:', this.activeOIDs.OUTPUT_CURRENT);
        console.log('---------------------------------------');
      }

@@ -324,20 +328,65 @@ export class NupstSnmp {
        config,
      ) || 0;

+      // Get power draw metrics
+      const outputLoad = await this.getSNMPValueWithRetry(
+        this.activeOIDs.OUTPUT_LOAD,
+        'output load',
+        config,
+      ) || 0;
+      const outputPower = await this.getSNMPValueWithRetry(
+        this.activeOIDs.OUTPUT_POWER,
+        'output power',
+        config,
+      ) || 0;
+      const outputVoltage = await this.getSNMPValueWithRetry(
+        this.activeOIDs.OUTPUT_VOLTAGE,
+        'output voltage',
+        config,
+      ) || 0;
+      const outputCurrent = await this.getSNMPValueWithRetry(
+        this.activeOIDs.OUTPUT_CURRENT,
+        'output current',
+        config,
+      ) || 0;
+
      // Determine power status - handle different values for different UPS models
      const powerStatus = this.determinePowerStatus(config.upsModel, powerStatusValue);

      // Convert to minutes for UPS models with different time units
      const processedRuntime = this.processRuntimeValue(config.upsModel, batteryRuntime);

+      // Process power metrics with vendor-specific scaling
+      const processedVoltage = this.processVoltageValue(config.upsModel, outputVoltage);
+      const processedCurrent = this.processCurrentValue(config.upsModel, outputCurrent);
+
+      // Calculate power from voltage × current if not provided by UPS
+      let processedPower = outputPower;
+      if (outputPower === 0 && processedVoltage > 0 && processedCurrent > 0) {
+        processedPower = Math.round(processedVoltage * processedCurrent);
+        if (this.debug) {
+          console.log(
+            `Calculated power from V×I: ${processedVoltage}V × ${processedCurrent}A = ${processedPower}W`,
+          );
+        }
+      }
+
      const result = {
        powerStatus,
        batteryCapacity,
        batteryRuntime: processedRuntime,
+        outputLoad,
+        outputPower: processedPower,
+        outputVoltage: processedVoltage,
+        outputCurrent: processedCurrent,
        raw: {
          powerStatus: powerStatusValue,
          batteryCapacity,
          batteryRuntime,
+          outputLoad,
+          outputPower,
+          outputVoltage,
+          outputCurrent,
        },
      };

@@ -347,6 +396,10 @@ export class NupstSnmp {
        console.log('  Power Status:', result.powerStatus);
        console.log('  Battery Capacity:', result.batteryCapacity + '%');
        console.log('  Battery Runtime:', result.batteryRuntime, 'minutes');
+        console.log('  Output Load:', result.outputLoad + '%');
+        console.log('  Output Power:', result.outputPower, 'watts');
+        console.log('  Output Voltage:', result.outputVoltage, 'volts');
+        console.log('  Output Current:', result.outputCurrent, 'amps');
        console.log('---------------------------------------');
      }

@@ -602,4 +655,74 @@ export class NupstSnmp {

    return batteryRuntime;
  }
+
+  /**
+   * Process voltage value based on UPS model
+   * @param upsModel UPS model
+   * @param outputVoltage Raw output voltage value
+   * @returns Processed voltage in volts
+   */
+  private processVoltageValue(
+    upsModel: TUpsModel | undefined,
+    outputVoltage: number,
+  ): number {
+    if (this.debug) {
+      console.log('Raw voltage value:', outputVoltage);
+    }
+
+    if (upsModel === 'cyberpower' && outputVoltage > 0) {
+      // CyberPower: Voltage is in 0.1V, convert to volts
+      const volts = outputVoltage / 10;
+      if (this.debug) {
+        console.log(
+          `Converting CyberPower voltage from ${outputVoltage} (0.1V) to ${volts} volts`,
+        );
+      }
+      return volts;
+    }
+
+    return outputVoltage;
+  }
+
+  /**
+   * Process current value based on UPS model
+   * @param upsModel UPS model
+   * @param outputCurrent Raw output current value
+   * @returns Processed current in amps
+   */
+  private processCurrentValue(
+    upsModel: TUpsModel | undefined,
+    outputCurrent: number,
+  ): number {
+    if (this.debug) {
+      console.log('Raw current value:', outputCurrent);
+    }
+
+    if (upsModel === 'cyberpower' && outputCurrent > 0) {
+      // CyberPower: Current is in 0.1A, convert to amps
+      const amps = outputCurrent / 10;
+      if (this.debug) {
+        console.log(
+          `Converting CyberPower current from ${outputCurrent} (0.1A) to ${amps} amps`,
+        );
+      }
+      return amps;
+    } else if ((upsModel === 'tripplite' || upsModel === 'liebert') && outputCurrent > 0) {
+      // RFC 1628 standard: Current is in 0.1A, convert to amps
+      const amps = outputCurrent / 10;
+      if (this.debug) {
+        console.log(
+          `Converting RFC 1628 current from ${outputCurrent} (0.1A) to ${amps} amps`,
+        );
+      }
+      return amps;
+    }
+
+    // Eaton XUPS-MIB and APC PowerNet report current directly in RMS Amps (no scaling needed)
+    if ((upsModel === 'eaton' || upsModel === 'apc') && this.debug && outputCurrent > 0) {
+      console.log(`${upsModel.toUpperCase()} current already in RMS Amps: ${outputCurrent}A`);
+    }
+
+    return outputCurrent;
+  }
 }
--- a/ts/snmp/oid-sets.ts
+++ b/ts/snmp/oid-sets.ts
@@ -14,28 +14,40 @@ export class UpsOidSets {
      POWER_STATUS: '1.3.6.1.4.1.3808.1.1.1.4.1.1.0', // upsBaseOutputStatus
      BATTERY_CAPACITY: '1.3.6.1.4.1.3808.1.1.1.2.2.1.0', // upsAdvanceBatteryCapacity (percentage)
      BATTERY_RUNTIME: '1.3.6.1.4.1.3808.1.1.1.2.2.4.0', // upsAdvanceBatteryRunTimeRemaining (TimeTicks)
+      OUTPUT_LOAD: '1.3.6.1.4.1.3808.1.1.1.4.2.3.0', // upsAdvanceOutputLoad (percentage)
+      OUTPUT_POWER: '1.3.6.1.4.1.3808.1.1.1.4.2.5.0', // upsAdvanceOutputPower (watts)
+      OUTPUT_VOLTAGE: '1.3.6.1.4.1.3808.1.1.1.4.2.1.0', // upsAdvanceOutputVoltage (0.1V scale)
+      OUTPUT_CURRENT: '1.3.6.1.4.1.3808.1.1.1.4.2.4.0', // upsAdvanceOutputCurrent (0.1A scale)
      POWER_STATUS_VALUES: {
        online: 2, // upsBaseOutputStatus: 2=onLine
        onBattery: 3, // upsBaseOutputStatus: 3=onBattery
      },
    },

-    // APC OIDs
+    // APC OIDs (PowerNet MIB)
    apc: {
      POWER_STATUS: '1.3.6.1.4.1.318.1.1.1.4.1.1.0', // upsBasicOutputStatus
      BATTERY_CAPACITY: '1.3.6.1.4.1.318.1.1.1.2.2.1.0', // Battery capacity in percentage
      BATTERY_RUNTIME: '1.3.6.1.4.1.318.1.1.1.2.2.3.0', // Remaining runtime in minutes
+      OUTPUT_LOAD: '1.3.6.1.4.1.318.1.1.1.4.2.3.0', // upsAdvOutputLoad (percentage)
+      OUTPUT_POWER: '1.3.6.1.4.1.318.1.1.1.4.2.8.0', // upsAdvOutputActivePower (watts)
+      OUTPUT_VOLTAGE: '1.3.6.1.4.1.318.1.1.1.4.2.1.0', // upsAdvOutputVoltage
+      OUTPUT_CURRENT: '1.3.6.1.4.1.318.1.1.1.4.2.4.0', // upsAdvOutputCurrent
      POWER_STATUS_VALUES: {
        online: 2, // upsBasicOutputStatus: 2=onLine
        onBattery: 3, // upsBasicOutputStatus: 3=onBattery
      },
    },

-    // Eaton OIDs
+    // Eaton OIDs (XUPS-MIB)
    eaton: {
      POWER_STATUS: '1.3.6.1.4.1.534.1.4.4.0', // xupsOutputSource
      BATTERY_CAPACITY: '1.3.6.1.4.1.534.1.2.4.0', // xupsBatCapacity (percentage)
      BATTERY_RUNTIME: '1.3.6.1.4.1.534.1.2.1.0', // xupsBatTimeRemaining (seconds)
+      OUTPUT_LOAD: '1.3.6.1.4.1.534.1.4.4.1.8.1', // xupsOutputPercentLoad (phase 1)
+      OUTPUT_POWER: '1.3.6.1.4.1.534.1.4.4.1.4.1', // xupsOutputWatts (phase 1)
+      OUTPUT_VOLTAGE: '1.3.6.1.4.1.534.1.4.4.1.2.1', // xupsOutputVoltage (phase 1)
+      OUTPUT_CURRENT: '1.3.6.1.4.1.534.1.4.4.1.3.1', // xupsOutputCurrent (phase 1)
      POWER_STATUS_VALUES: {
        online: 3, // xupsOutputSource: 3=normal (mains power)
        onBattery: 5, // xupsOutputSource: 5=battery
@@ -47,6 +59,10 @@ export class UpsOidSets {
      POWER_STATUS: '1.3.6.1.4.1.850.1.1.3.1.1.1.0', // tlUpsOutputSource
      BATTERY_CAPACITY: '1.3.6.1.4.1.850.1.1.3.2.4.1.0', // Battery capacity in percentage
      BATTERY_RUNTIME: '1.3.6.1.4.1.850.1.1.3.2.2.1.0', // Remaining runtime in minutes
+      OUTPUT_LOAD: '1.3.6.1.2.1.33.1.4.4.1.5.1', // RFC 1628: upsOutputPercentLoad
+      OUTPUT_POWER: '1.3.6.1.2.1.33.1.4.4.1.4.1', // RFC 1628: upsOutputPower (watts)
+      OUTPUT_VOLTAGE: '1.3.6.1.2.1.33.1.4.4.1.2.1', // RFC 1628: upsOutputVoltage
+      OUTPUT_CURRENT: '1.3.6.1.2.1.33.1.4.4.1.3.1', // RFC 1628: upsOutputCurrent (0.1A scale)
      POWER_STATUS_VALUES: {
        online: 2, // tlUpsOutputSource: 2=normal (mains power)
        onBattery: 3, // tlUpsOutputSource: 3=onBattery
@@ -58,6 +74,10 @@ export class UpsOidSets {
      POWER_STATUS: '1.3.6.1.4.1.476.1.42.3.9.20.1.20.1.2.1.2.1', // lgpPwrOutputSource
      BATTERY_CAPACITY: '1.3.6.1.4.1.476.1.42.3.9.20.1.20.1.2.1.4.1', // Battery capacity in percentage
      BATTERY_RUNTIME: '1.3.6.1.4.1.476.1.42.3.9.20.1.20.1.2.1.5.1', // Remaining runtime in minutes
+      OUTPUT_LOAD: '1.3.6.1.2.1.33.1.4.4.1.5.1', // RFC 1628: upsOutputPercentLoad
+      OUTPUT_POWER: '1.3.6.1.2.1.33.1.4.4.1.4.1', // RFC 1628: upsOutputPower (watts)
+      OUTPUT_VOLTAGE: '1.3.6.1.2.1.33.1.4.4.1.2.1', // RFC 1628: upsOutputVoltage
+      OUTPUT_CURRENT: '1.3.6.1.2.1.33.1.4.4.1.3.1', // RFC 1628: upsOutputCurrent (0.1A scale)
      POWER_STATUS_VALUES: {
        online: 2, // lgpPwrOutputSource: 2=normal (mains power)
        onBattery: 3, // lgpPwrOutputSource: 3=onBattery
@@ -69,6 +89,10 @@ export class UpsOidSets {
      POWER_STATUS: '',
      BATTERY_CAPACITY: '',
      BATTERY_RUNTIME: '',
+      OUTPUT_LOAD: '',
+      OUTPUT_POWER: '',
+      OUTPUT_VOLTAGE: '',
+      OUTPUT_CURRENT: '',
    },
  };

@@ -90,6 +114,10 @@ export class UpsOidSets {
      'power status': '1.3.6.1.2.1.33.1.4.1.0', // upsOutputSource
      'battery capacity': '1.3.6.1.2.1.33.1.2.4.0', // upsEstimatedChargeRemaining
      'battery runtime': '1.3.6.1.2.1.33.1.2.3.0', // upsEstimatedMinutesRemaining
+      'output load': '1.3.6.1.2.1.33.1.4.4.1.5.1', // upsOutputPercentLoad (indexed by line)
+      'output power': '1.3.6.1.2.1.33.1.4.4.1.4.1', // upsOutputPower in watts (indexed by line)
+      'output voltage': '1.3.6.1.2.1.33.1.4.4.1.2.1', // upsOutputVoltage (indexed by line)
+      'output current': '1.3.6.1.2.1.33.1.4.4.1.3.1', // upsOutputCurrent in 0.1A (indexed by line)
    };
  }
 }
--- a/ts/snmp/types.ts
+++ b/ts/snmp/types.ts
@@ -14,6 +14,14 @@ export interface IUpsStatus {
  batteryCapacity: number;
  /** Remaining runtime in minutes */
  batteryRuntime: number;
+  /** Output load percentage (0-100) */
+  outputLoad: number;
+  /** Output power in watts */
+  outputPower: number;
+  /** Output voltage in volts */
+  outputVoltage: number;
+  /** Output current in amps */
+  outputCurrent: number;
  /** Raw values from SNMP responses */
  raw: Record<string, any>;
 }
@@ -28,6 +36,14 @@ export interface IOidSet {
  BATTERY_CAPACITY: string;
  /** OID for battery runtime */
  BATTERY_RUNTIME: string;
+  /** OID for output load percentage */
+  OUTPUT_LOAD: string;
+  /** OID for output power in watts */
+  OUTPUT_POWER: string;
+  /** OID for output voltage */
+  OUTPUT_VOLTAGE: string;
+  /** OID for output current */
+  OUTPUT_CURRENT: string;
  /** Power status value mappings */
  POWER_STATUS_VALUES?: {
    /** SNMP value that indicates UPS is online (on AC power) */
Author	SHA1	Message	Date
Juergen Kunz	f81f5957ab	5.1.6 Some checks failed CI / Type Check & Lint (push) Successful in 5s Details CI / Build Test (Current Platform) (push) Successful in 6s Details CI / Build All Platforms (push) Successful in 53s Details Publish to npm / npm-publish (push) Failing after 53s Details Release / build-and-release (push) Successful in 1m7s Details	2025-10-23 13:18:22 +00:00
Juergen Kunz	281d3fbbeb	fix(ci): correct setup-deno action version to install Deno 2.x Some checks failed CI / Type Check & Lint (push) Successful in 9s Details CI / Build Test (Current Platform) (push) Successful in 8s Details CI / Build All Platforms (push) Has been cancelled Details	2025-10-23 13:17:56 +00:00
Juergen Kunz	c1cb136a7d	5.1.5 Some checks failed CI / Type Check & Lint (push) Failing after 4s Details CI / Build Test (Current Platform) (push) Failing after 3s Details CI / Build All Platforms (push) Failing after 3s Details Release / build-and-release (push) Failing after 4s Details	2025-10-23 13:15:44 +00:00
Juergen Kunz	b80275a594	5.1.3 Some checks failed CI / Type Check & Lint (push) Failing after 4s Details CI / Build Test (Current Platform) (push) Failing after 4s Details CI / Build All Platforms (push) Failing after 4s Details Release / build-and-release (push) Failing after 4s Details	2025-10-23 13:03:35 +00:00
Juergen Kunz	b64a515c94	set deno version	2025-10-23 13:03:29 +00:00
Juergen Kunz	68c4eb6480	5.1.2 Some checks failed CI / Type Check & Lint (push) Failing after 3s Details CI / Build Test (Current Platform) (push) Failing after 3s Details CI / Build All Platforms (push) Failing after 3s Details Release / build-and-release (push) Failing after 3s Details	2025-10-23 13:00:24 +00:00
Juergen Kunz	6c8f6ac33f	fix(scripts): Add build script to package.json and include local dev tool settings	2025-10-23 13:00:24 +00:00
Juergen Kunz	ffa491c7a1	5.1.1 Some checks failed Release / build-and-release (push) Failing after 3s Details	2025-10-23 12:57:58 +00:00
Juergen Kunz	777d48d82e	fix(tooling): better oids and more power metrics. Also new json httpServer feature support.	2025-10-23 12:57:58 +00:00
Juergen Kunz	b7a0bbcf6d	fix(snmp): Update current handling for Tripplite and Liebert models; add APC current logging	2025-10-23 12:45:29 +00:00
Juergen Kunz	fbe1cd64cb	feat(snmp): Enhance SNMP metrics with output load, power, voltage, and current readings	2025-10-23 12:25:59 +00:00