⚡ Quick Start

Get your device connected to the UFO Agent Server and start executing tasks in minutes. No complex setup—just run a single command.

---

📋 Prerequisites

Before connecting a client device, ensure these requirements are met:

Requirement	Version/Details	Verification Command
Python	3.10 or higher	python --version
UFO Installation	Latest version with dependencies	python -c "import ufo; print('✅ Installed')"
Running Server	Agent server accessible on network	curl http://server:5000/api/health
Network Access	Client can reach server WebSocket endpoint	Test connectivity to server

!!! tip "Server First!" Always start the Agent Server before connecting clients. The server must be running and accessible for clients to register successfully.

👉 [Server Quick Start Guide](../server/quick_start.md)

Verify Server Status:

Windows:

# Test HTTP API
Invoke-WebRequest -Uri http://localhost:5000/api/health
    
# Test WebSocket (requires wscat)
wscat -c ws://localhost:5000/ws

Linux/macOS:

# Test HTTP API
curl http://localhost:5000/api/health
    
# Test WebSocket (requires wscat)
wscat -c ws://localhost:5000/ws

---

🚀 Starting a Device Client

Minimal Command (Local Server)

Connect to a server running on the same machine with default settings:

python -m ufo.client.client --ws --client-id my_device

What This Does:

Parameter	Default Value	Purpose
--ws	N/A (flag)	Enable WebSocket mode (required)
--client-id	my_device	Unique identifier for this device
--ws-server	ws://localhost:5000/ws	Connect to local server
--platform	Auto-detected	Detected from platform.system()
--max-retries	5	Connection retry attempts

Connect to Remote Server

Connect to a server running on a different machine in your network:

python -m ufo.client.client \
  --ws \
  --ws-server ws://192.168.1.100:5000/ws \
  --client-id device_windows_001

Network Requirements:

• ✅ Client can ping the server: ping 192.168.1.100
• ✅ Port 5000 is accessible (firewall allows)
• ✅ Server is running and listening on correct port

Override Platform Detection

!!! tip "When to Override" Normally, the client auto-detects the platform (windows or linux). Override when:

- Running in container/VM with mismatched OS
- Testing cross-platform behavior
- Platform detection fails

python -m ufo.client.client \
  --ws \
  --ws-server ws://127.0.0.1:5000/ws \
  --client-id my_linux_device \
  --platform linux

Complete Command (All Options)

Production-ready configuration with all available options:

python -m ufo.client.client \
  --ws \
  --ws-server ws://192.168.1.100:5000/ws \
  --client-id device_windows_prod_01 \
  --platform windows \
  --max-retries 10 \
  --log-level WARNING

Enhancements:

• 🔁 10 retries: Resilient to temporary network issues
• 📋 WARNING logging: Default level (less verbose than INFO)
• 🏷️ Descriptive ID: device_windows_prod_01 clearly identifies environment

---

📝 Connection Parameters Reference

All available command-line options for the UFO client.

Required Parameters

Parameter	Description	Example
--ws	Enable WebSocket mode (flag, no value)	--ws

Connection Parameters

Parameter	Type	Default	Description	Example
--ws-server	str	ws://localhost:5000/ws	WebSocket server URL	--ws-server ws://192.168.1.10:5000/ws
--max-retries	int	5	Maximum connection retry attempts	--max-retries 10

Device Parameters

Parameter	Type	Default	Description	Example
--client-id	str	client_001	Unique device identifier	--client-id device_win_prod_01
--platform	str	Auto-detect	Platform override: windows or linux	--platform linux

Logging Parameters

Parameter	Type	Default	Description	Example
--log-level	str	WARNING	Logging verbosity: DEBUG, INFO, WARNING, ERROR, CRITICAL, OFF	--log-level DEBUG

!!! warning "Unique Client IDs - Critical!" Each device MUST have a unique --client-id. Duplicate IDs will cause:

- ❌ Connection conflicts (devices disconnecting each other)
- ❌ Task routing failures (tasks sent to wrong device)
- ❌ Session corruption (server state confusion)

**Best Practice:** Use descriptive IDs:
```
✅ device_windows_prod_datacenter1_rack3
✅ device_linux_staging_jenkins_worker2
❌ client_001
❌ device1
```

---

✅ Successful Connection

Client Logs

When the client connects successfully, you'll see this sequence:

INFO - Platform detected/specified: windows
INFO - UFO Client initialized for platform: windows
INFO - [WS] Connecting to ws://127.0.0.1:5000/ws (attempt 1/5)
INFO - [WS] [AIP] Collected device info: platform=windows, cpu=8, memory=16.0GB
INFO - [WS] [AIP] Attempting to register as device_windows_001
INFO - [WS] [AIP] ✅ Successfully registered as device_windows_001
INFO - [WS] Heartbeat loop started (interval: 30s)

Registration Flow:

sequenceDiagram
    participant C as Client
    participant S as Server
    
    C->>C: Load Config & Initialize MCP
    C->>S: WebSocket Connect
    S-->>C: Connection Ack
    
    C->>C: Collect Device Info
    C->>S: REGISTRATION<br/>(id, platform, capabilities)
    S->>S: Validate & Store
    S-->>C: REGISTRATION_ACK
    
    loop Every 30s
        C->>S: HEARTBEAT
        S-->>C: HEARTBEAT_ACK
    end
    
    Note over C,S: Ready for Commands

Server Logs

On the server side, you'll see:

INFO - [WS] ✅ Registered device client: device_windows_001
INFO - [WS] Device device_windows_001 capabilities: {
  "platform": "windows",
  "cpu_count": 8,
  "memory_gb": 16.0,
  "mcp_servers": ["system_info", "gui_automation"]
}

---

🔍 Verify Connection

Check Connected Clients (HTTP API)

From the server machine or any network-accessible machine:

cURL:

curl http://localhost:5000/api/clients

PowerShell:

Invoke-RestMethod -Uri http://localhost:5000/api/clients | ConvertTo-Json

Python:

import requests
response = requests.get("http://localhost:5000/api/clients")
print(response.json())

Expected Response:

{
  "clients": [
    {
      "client_id": "device_windows_001",
      "type": "device",
      "platform": "windows",
      "connected_at": 1730736000.0,
      "uptime_seconds": 45,
      "capabilities": {
        "cpu_count": 8,
        "memory_gb": 16.0,
        "mcp_servers": ["system_info", "gui_automation"]
      }
    }
  ],
  "total": 1
}

Client Status Indicators:

Field	Description	Example
client_id	Unique device identifier	device_windows_001
type	Client type (always "device")	device
platform	Operating system	windows, linux
connected_at	Unix timestamp of connection	1730736000.0
uptime_seconds	Seconds since connection	45
capabilities	Device hardware/software profile	CPU, memory, MCP servers

Monitor Heartbeats

The client sends heartbeat messages every 30 seconds to prove it's still alive.

Client Logs (DEBUG level):

DEBUG - [WS] [AIP] Heartbeat sent
DEBUG - [WS] [AIP] Heartbeat acknowledged

Server Logs (DEBUG level):

DEBUG - [WS] Heartbeat received from device_windows_001
DEBUG - [WS] Heartbeat acknowledged for device_windows_001

---

🎯 Running Your First Task

Once the client is connected, dispatch a simple task from the server to verify end-to-end functionality.

Dispatch Task via HTTP API

cURL:

curl -X POST http://localhost:5000/api/dispatch \
  -H "Content-Type: application/json" \
  -d '{
    "client_id": "device_windows_001",
    "request": "Open Notepad and type Hello from UFO"
  }'

PowerShell:

$body = @{
    client_id = "device_windows_001"
    request   = "Open Notepad and type Hello from UFO"
} | ConvertTo-Json
    
Invoke-RestMethod -Uri http://localhost:5000/api/dispatch `
  -Method POST `
  -ContentType "application/json" `
  -Body $body

Python:

import requests
    
response = requests.post(
    "http://localhost:5000/api/dispatch",
    json={
        "client_id": "device_windows_001",
        "request": "Open Notepad and type Hello from UFO"
    }
)
print(response.json())

Server Response

{
  "status": "success",
  "session_id": "session_20251104_143022_abc123",
  "message": "Task dispatched to device_windows_001",
  "client_id": "device_windows_001"
}

Response Fields:

Field	Description
status	"success" or "error"
session_id	Unique session identifier for tracking
message	Human-readable status message
client_id	Target device that received the task

Client Execution Logs

INFO - [WS] Starting task: Open Notepad and type Hello from UFO
INFO - [WS] [AIP] Sent task request with platform: windows
INFO - Executing 3 actions in total
INFO - [WS] [AIP] Sent client result for prev_response_id: resp_abc123
INFO - [WS] Task session_20251104_143022_abc123 completed

Execution Flow:

sequenceDiagram
    participant API as HTTP API
    participant Server
    participant Client
    participant App as Notepad
    
    API->>Server: POST /dispatch
    Server->>Server: Create Session
    Server-->>API: {session_id, status}
    
    Server->>Client: COMMAND
    Client->>App: Launch & Type
    App-->>Client: Done
    Client->>Server: COMMAND_RESULTS

---

⚠️ Common Issues

1. Connection Refused

Symptom:

ERROR - [WS] Unexpected error: [Errno 10061] Connect call failed
ERROR - [WS] Max retries reached. Exiting.

Root Causes:

Cause	Verification	Solution
Server not running	curl http://localhost:5000/api/health	Start server first
Wrong port	Check server startup logs	Use correct port (--ws-server ws://...)
Firewall blocking	telnet server 5000	Allow port 5000 in firewall
Server using --local flag	Check server CLI args	Connect from localhost only

Solutions:

Verify Server:

# Check if server is running
curl http://localhost:5000/api/health
    
# Expected response:
# {"status": "healthy", "uptime_seconds": 123}

Check Firewall:

# Windows: Check if port is listening
netstat -an | findstr ":5000"
    
# Linux: Check if port is listening
netstat -tuln | grep :5000

Fix Connection:

# Ensure server and client match:
# Server: --port 5000
# Client: --ws-server ws://localhost:5000/ws

2. Registration Failed

Symptom:

ERROR - [WS] [AIP] ❌ Failed to register as device_windows_001
RuntimeError: Registration failed for device_windows_001

Root Causes:

Cause	Explanation	Solution
Duplicate client ID	Another device using same ID	Use unique --client-id
Server rejecting connection	Server validation error	Check server logs for details
Network interruption	Connection dropped during registration	Retry connection
Device info collection error	Failed to gather system info	Check MCP server initialization

Solutions:

Check Duplicate IDs:

# List all connected clients
curl http://localhost:5000/api/clients | grep client_id
    
# If your ID appears, choose a different one
python -m ufo.client.client --ws --client-id NEW_UNIQUE_ID

Check Server Logs:

# Server logs show detailed rejection reasons
# Example: "Client ID already exists"
# Example: "Platform mismatch"

3. Platform Detection Issues

Symptom:

WARNING - Platform not detected correctly
WARNING - Defaulting to platform: unknown

Solution:

Explicitly set the platform:

python -m ufo.client.client \
  --ws \
  --ws-server ws://127.0.0.1:5000/ws \
  --client-id my_device \
  --platform windows  # or 'linux'

Platform Values:

Value	OS	Auto-Detection
windows	Windows 10/11, Server 2016+	platform.system() == "Windows"
linux	Ubuntu, Debian, RHEL, etc.	platform.system() == "Linux"

4. Heartbeat Timeout

Symptom:

ERROR - [WS] Connection closed: ConnectionClosedError
INFO - [WS] Reconnecting... (attempt 2/5)

Root Causes:

Cause	Description	Solution
Network instability	Wi-Fi dropouts, packet loss	Use wired connection
Server crashed	Server process terminated	Restart server
Proxy interference	Corporate proxy blocking WebSocket	Configure proxy bypass
Firewall timeout	Idle connection timeout	Reduce heartbeat interval

Solutions:

Increase Retries:

# For unreliable networks
python -m ufo.client.client \
  --ws \
  --ws-server ws://server:5000/ws \
  --client-id my_device \
  --max-retries 20

Check Network:

# Test sustained connection
ping -t server  # Windows
ping server     # Linux (Ctrl+C to stop)

Verify Server:

# Check if server is still running
curl http://server:5000/api/health

---

🌐 Multiple Devices

Connect multiple devices to the same server for fleet management and task distribution.

Example Configuration

Device 1 (Windows Desktop):

python -m ufo.client.client \
  --ws \
  --ws-server ws://192.168.1.100:5000/ws \
  --client-id device_windows_desktop_001

Device 2 (Linux Server):

python -m ufo.client.client \
  --ws \
  --ws-server ws://192.168.1.100:5000/ws \
  --client-id device_linux_server_001 \
  --platform linux

Device 3 (Windows Laptop):

python -m ufo.client.client \
  --ws \
  --ws-server ws://192.168.1.100:5000/ws \
  --client-id device_windows_laptop_002

Verify All Connected

curl http://192.168.1.100:5000/api/clients

Expected Response:

{
  "clients": [
    {
      "client_id": "device_windows_desktop_001",
      "type": "device",
      "platform": "windows",
      "uptime_seconds": 120
    },
    {
      "client_id": "device_linux_server_001",
      "type": "device",
      "platform": "linux",
      "uptime_seconds": 95
    },
    {
      "client_id": "device_windows_laptop_002",
      "type": "device",
      "platform": "windows",
      "uptime_seconds": 45
    }
  ],
  "total": 3
}

Client ID Naming Convention:

device_<platform>_<environment>_<location>_<number>

Examples:
- device_windows_prod_datacenter1_001
- device_linux_staging_cloud_aws_002
- device_windows_dev_office_laptop_john

---

🔧 Running as Background Service

!!! tip "Production Deployment" For production use, run the client as a system service that starts automatically and restarts on failure.

Linux (systemd)

Create /etc/systemd/system/ufo-client.service:

[Unit]
Description=UFO Device Client - Execution Agent
Documentation=https://github.com/microsoft/UFO
After=network-online.target
Wants=network-online.target

[Service]
Type=simple
User=ufouser
Group=ufouser
WorkingDirectory=/home/ufouser/UFO2

# Environment variables (if needed)
Environment="PYTHONUNBUFFERED=1"

# Main command
ExecStart=/usr/bin/python3 -m ufo.client.client \
  --ws \
  --ws-server ws://192.168.1.100:5000/ws \
  --client-id device_linux_prod_01 \
  --platform linux \
  --log-level INFO

# Restart policy
Restart=always
RestartSec=10
StartLimitBurst=5
StartLimitIntervalSec=300

# Resource limits (optional)
LimitNOFILE=65536
MemoryLimit=2G

# Logging
StandardOutput=journal
StandardError=journal
SyslogIdentifier=ufo-client

[Install]
WantedBy=multi-user.target

Enable and Start:

# Reload systemd configuration
sudo systemctl daemon-reload

# Enable service (start on boot)
sudo systemctl enable ufo-client

# Start service now
sudo systemctl start ufo-client

# Check status
sudo systemctl status ufo-client

# View logs
sudo journalctl -u ufo-client -f

Service Management:

Command	Purpose
systemctl start ufo-client	Start the service
systemctl stop ufo-client	Stop the service
systemctl restart ufo-client	Restart the service
systemctl status ufo-client	Check service status
journalctl -u ufo-client -f	Follow logs in real-time
systemctl disable ufo-client	Disable auto-start

Windows (NSSM)

NSSM (Non-Sucking Service Manager) wraps any application as a Windows service.

1. Download NSSM:

Download from nssm.cc

2. Install Service:

# Install as service
nssm install UFOClient "C:\Python310\python.exe" `
  "-m" "ufo.client.client" `
  "--ws" `
  "--ws-server" "ws://192.168.1.100:5000/ws" `
  "--client-id" "device_windows_prod_01" `
  "--log-level" "INFO"

# Set working directory
nssm set UFOClient AppDirectory "C:\UFO2"

# Set restart policy
nssm set UFOClient AppExit Default Restart
nssm set UFOClient AppRestartDelay 10000

# Set logging
nssm set UFOClient AppStdout "C:\UFO2\logs\client-stdout.log"
nssm set UFOClient AppStderr "C:\UFO2\logs\client-stderr.log"

3. Manage Service:

# Start service
nssm start UFOClient

# Check status
nssm status UFOClient

# Stop service
nssm stop UFOClient

# Remove service
nssm remove UFOClient confirm

Alternative: Windows Task Scheduler

# Create scheduled task to run on startup
$action = New-ScheduledTaskAction -Execute "python.exe" `
  -Argument "-m ufo.client.client --ws --ws-server ws://server:5000/ws --client-id device_win_01"
$trigger = New-ScheduledTaskTrigger -AtStartup
$settings = New-ScheduledTaskSettingsSet -RestartCount 3 -RestartInterval (New-TimeSpan -Minutes 1)

Register-ScheduledTask -TaskName "UFOClient" `
  -Action $action `
  -Trigger $trigger `
  -Settings $settings `
  -User "System" `
  -RunLevel Highest

PM2 (Cross-Platform)

PM2 is a cross-platform process manager with built-in load balancing, monitoring, and auto-restart.

1. Install PM2:

npm install -g pm2

2. Create Ecosystem File (ecosystem.config.js):

module.exports = {
  apps: [{
    name: "ufo-client",
    script: "python",
    args: [
      "-m", "ufo.client.client",
      "--ws",
      "--ws-server", "ws://192.168.1.100:5000/ws",
      "--client-id", "device_prod_01",
      "--log-level", "INFO"
    ],
    cwd: "/home/user/UFO2",
    interpreter: "none",
    autorestart: true,
    watch: false,
    max_restarts: 10,
    min_uptime: "10s",
    restart_delay: 5000,
    env: {
      PYTHONUNBUFFERED: "1"
    }
  }]
};

3. Start with PM2:

# Start from ecosystem file
pm2 start ecosystem.config.js

# Or start directly
pm2 start "python -m ufo.client.client --ws --ws-server ws://192.168.1.100:5000/ws --client-id device_001" \
  --name ufo-client

# Save PM2 configuration
pm2 save

# Enable startup script (auto-start on boot)
pm2 startup
# Follow the instructions printed by the command

# Monitor
pm2 monit

# View logs
pm2 logs ufo-client

PM2 Management:

Command	Purpose
pm2 list	List all processes
pm2 start ufo-client	Start process
pm2 stop ufo-client	Stop process
pm2 restart ufo-client	Restart process
pm2 delete ufo-client	Remove process
pm2 logs ufo-client	View logs
pm2 monit	Real-time monitoring dashboard

---

🏭 Production Deployment Best Practices

Follow these best practices for reliable production deployments.

1. Descriptive Client IDs

# ❌ Bad: Generic, non-unique
--client-id client_001
--client-id device1

# ✅ Good: Descriptive, environment, location
--client-id production_windows_datacenter1_rack3_slot1
--client-id staging_linux_cloud_aws_us-east-1_worker2
--client-id dev_windows_office_john_laptop

ID Structure:

<environment>_<platform>_<location>_<identifier>

- environment: production, staging, development, test
- platform: windows, linux
- location: datacenter1, cloud_aws, office
- identifier: unique number or name

2. Structured Logging

File Logging:

# Redirect to log file with rotation
python -m ufo.client.client \
  --ws \
  --ws-server ws://server:5000/ws \
  --client-id device_prod_01 \
  --log-level INFO \
  > /var/log/ufo-client.log 2>&1

Systemd Journal:

# Already configured in systemd service
# View logs:
journalctl -u ufo-client -f --since "1 hour ago"

Syslog:

# Configure Python logging to send to syslog
# Add to config_dev.yaml:
# logging:
#   handlers:
#     syslog:
#       class: logging.handlers.SysLogHandler
#       address: /dev/log

3. Automatic Restart on Failure

Service Configuration:

Platform	Mechanism	Restart Delay	Max Restarts
Linux	systemd	10 seconds	Unlimited (with rate limiting)
Windows	NSSM	10 seconds	Unlimited
Cross-platform	PM2	5 seconds	10 attempts, then manual

4. Health Monitoring

Monitoring Script:

#!/bin/bash
# check-ufo-client.sh

CLIENT_ID="device_prod_01"
SERVER_URL="http://192.168.1.100:5000"

# Check if client is connected
response=$(curl -s "${SERVER_URL}/api/clients" | grep -c "${CLIENT_ID}")

if [ "$response" -eq "0" ]; then
    echo "ALERT: Client ${CLIENT_ID} is not connected!"
    # Send alert (email, Slack, PagerDuty, etc.)
    exit 1
else
    echo "OK: Client ${CLIENT_ID} is connected"
    exit 0
fi

Run via cron:

# Check every 5 minutes
*/5 * * * * /usr/local/bin/check-ufo-client.sh

5. Secure Communication

!!! danger "Production Security" Never expose clients to the internet without these security measures:

Use WSS (WebSocket Secure):

# Production: Encrypted WebSocket
--ws-server wss://ufo-server.company.com/ws

# Development only: Unencrypted
--ws-server ws://localhost:5000/ws

Server-Side TLS Configuration:

# Server with TLS
python -m ufo.server.app \
  --port 5000 \
  --ssl-cert /path/to/cert.pem \
  --ssl-key /path/to/key.pem

Network Security:

Measure	Implementation
Firewall Rules	Allow only server IP on port 5000
VPN/Private Network	Run server on internal network only
Authentication	Implement client authentication (future feature)
Certificate Validation	Verify server TLS certificates

---

🔧 Troubleshooting Commands

Use these commands to diagnose connection and execution issues.

Test Server Connectivity

HTTP Health Check:

curl http://localhost:5000/api/health
    
# Expected response:
# {"status": "healthy", "uptime_seconds": 3456}

WebSocket Test:

# Install wscat
npm install -g wscat
    
# Test WebSocket connection
wscat -c ws://localhost:5000/ws
    
# You should see connection established
# Send a test message (will likely be rejected, but connection works)

Network Connectivity:

# Test if server is reachable
ping 192.168.1.100
    
# Test if port is open
telnet 192.168.1.100 5000  # Windows/Linux
nc -zv 192.168.1.100 5000  # Linux/macOS

Check Connected Clients

# List all connected clients
curl http://localhost:5000/api/clients | python -m json.tool

# Check specific client
curl http://localhost:5000/api/clients | grep "device_windows_001"

Monitor Client Logs

Increase Verbosity:

# Enable DEBUG logging
python -m ufo.client.client \
  --ws \
  --client-id my_device \
  --log-level DEBUG

Filter Logs:

# Only show errors
python -m ufo.client.client --ws --client-id my_device 2>&1 | grep ERROR
    
# Only show connection events
python -m ufo.client.client --ws --client-id my_device 2>&1 | grep -E "Connect|Register"

Test Task Dispatch

# Dispatch simple test task
curl -X POST http://localhost:5000/api/dispatch \
  -H "Content-Type: application/json" \
  -d '{
    "client_id": "device_windows_001",
    "request": "List all files in the current directory"
  }'

---

🚀 Next Steps

!!! tip "Continue Learning" Now that your client is connected and running tasks:

1. Understand Registration Flow

Learn how clients register with the server and exchange device profiles:

👉 UFO Client Overview

2. Explore Device Information

Deep dive into what device information is collected and how it's used for task assignment:

👉 Device Info Provider

3. Master WebSocket Communication

Understand the AIP protocol and WebSocket message flow:

👉 WebSocket Client

4. Configure MCP Servers

Learn how to add custom tools and configure MCP servers:

👉 MCP Integration

5. Study the AIP Protocol

Deep dive into message types, flow control, and error handling:

👉 AIP Protocol

6. Production Deployment

Best practices for running clients in production environments:

👉 Configuration Guide