Vercel Deployment Watchdog Skill#

⚠️ SECURITY & USAGE DISCLAIMER

This skill is designed exclusively for monitoring your own web applications and deployments. It must not be used to probe, scan, or monitor any systems you do not own or have explicit permission to test.

Permitted Use:

• Monitoring your own websites and APIs deployed on Vercel or similar platforms
• Automated health checks for deployments you control
• Integration with your own alerting systems (Telegram, etc.)

Prohibited Use:

• Scanning third-party websites without authorization
• Attempting to access private/internal networks
• Testing systems you do not own or manage
• Any activity that could be considered unauthorized access or harassment

By using this skill, you agree to use it only for legitimate monitoring of your own infrastructure.

Skill Overview#

Automated deployment monitoring for Vercel-hosted applications. This skill provides:

1. Post-deployment health checks: Verify HTTP status, cache freshness, content validation
2. Vercel API integration: Detect new deployments automatically
3. Feed validation: Check API endpoints return valid JSON with expected data
4. Cron job setup: Schedule regular checks or trigger on deployment completion
5. Alerting integration: Configure OpenClaw cron jobs to send failure notifications via Telegram/WhatsApp or webhooks (delivery handled by OpenClaw platform)

🔒 Security & Compliance#

Built-in Safety Features#

The skill includes multiple security measures:

1. URL Validation: All URLs are validated to:
   • Require http:// or https:// protocol
   • Warn/block localhost addresses ( localhost, 127.0.0.1, 0.0.0.0)
   • Can be configured to block private IP ranges (RFC 1918)
   • Allow monitoring of internal resources via ALLOW_INTERNAL=true environment variable (requires explicit opt-in; no CLI bypass flags)
   • Security Warning: Only enable ALLOW_INTERNAL=true if you need to monitor localhost/private IPs and have explicit permission. Enabling it allows network access to internal addresses.
2. Credential Safety:
   • Never hardcodes API tokens or secrets
   • Accepts tokens via environment variables (primary) or CLI arguments
   • Scripts do not log sensitive credentials
3. Network Restrictions:
   • No outbound network calls to private IP ranges by default
   • Configurable timeout limits for HTTP requests
   • Rate limiting recommendations included

Compliance with ClawHub Policies#

This skill:

• Does not attempt to bypass security controls
• Does not include obfuscated or hidden functionality
• Is open source and transparent about all operations
• Respects robots.txt and common web standards
• Follows the principle of least privilege

Responsible Usage Requirements#

You must:

1. Have explicit permission to monitor all target URLs
2. Use your own API tokens with minimal required scopes
3. Respect rate limits of monitored services
4. Not use this skill for surveillance or harassment
5. Comply with all applicable laws and terms of service

Violation of these terms may result in removal from ClawHub and suspension of your account.

Quick Start#

1. Prerequisites#

bash

# Check if curl and jq are installed
command -v curl >/dev/null 2>&1 && command -v jq >/dev/null 2>&1 || {
    echo "Error: curl and jq are required but not installed."
    echo "Install them using your system package manager:"
    echo "  Debian/Ubuntu: sudo apt-get install curl jq"
    echo "  macOS: brew install curl jq"
    echo "  For other systems, see: https://curl.se/ and https://stedolan.github.io/jq/"
    exit 1
}

2. Set up Environment Variables#

Create a .env file or set environment variables:

bash

# Vercel API token (create at https://vercel.com/account/tokens)
export VERCEL_TOKEN="vcp_..."

# Target URLs to monitor
export HOMEPAGE_URL="https://your-site.com/"
export API_FEED_URL="https://your-site.com/api/feed"

# Optional: Telegram chat ID for OpenClaw cron notifications (not used by scripts)
export TELEGRAM_CHAT_ID="YOUR_TELEGRAM_CHAT_ID"

# Security: Only set ALLOW_INTERNAL=true if monitoring localhost/private IPs
# export ALLOW_INTERNAL="true"

3. Run Manual Check#

bash

# Make script executable
chmod +x scripts/watchdog-check.sh

# Run check
./scripts/watchdog-check.sh --homepage "$HOMEPAGE_URL" --api "$API_FEED_URL"

4. Schedule Monitoring with OpenClaw Cron (Recommended)#

For safe and integrated scheduling, use OpenClaw's built-in cron system instead of system cron:

javascript

// Create an OpenClaw cron job (every 5 minutes)
{
  "name": "Vercel Watchdog",
  "schedule": { "kind": "every", "everyMs": 300000 },
  "payload": {
    "kind": "agentTurn",
    "message": "Run deployment watchdog check for my site"
  },
  "delivery": {
    "mode": "announce",
    "channel": "telegram",
    "to": "YOUR_TELEGRAM_CHAT_ID"
  }
}

See the "Integration with OpenClaw" section below for more details.

Features#

Health Check Components#

1. HTTP Status Verification: Ensures homepage and API return 200 OK
2. Cache Freshness: Checks age: 0 and x-vercel-cache: MISS headers
3. Content Validation: Verifies page title contains expected text
4. JSON Feed Validation: Validates API response structure and data integrity
5. Deployment Detection: Uses Vercel API to find latest deployments

Vercel API Integration#

The skill can:

• List recent deployments to detect new ones
• Check deployment state ( READY, ERROR, BUILDING)
• Get deployment URLs and metadata
• Trigger health checks when deployment state changes to READY

Alerting#

When checks fail, the skill can:

• Send Telegram messages via OpenClaw
• Log detailed failure information
• Include remediation suggestions
• Escalate after repeated failures

Usage Examples#

Basic Health Check#

bash

./scripts/watchdog-check.sh --homepage "https://your-site.com" --api "https://your-site.com/api/feed"

Vercel Deployment Monitoring#

The script uses the VERCEL_TOKEN environment variable automatically, or you can pass it explicitly via --token.

bash

# Check for new deployments in the last 10 minutes
./scripts/vercel-monitor.sh --project "your-project" --since 10m

Script Reference#

scripts/watchdog-check.sh#

Main health check script with the following options:

bash

--homepage URL    # Homepage URL to check (default: https://your-site.com/)
--api URL         # API feed URL to check (default: https://your-site.com/api/feed)
--verbose         # Enable verbose output
--json            # Output results as JSON for programmatic use

scripts/vercel-monitor.sh#

Vercel API integration script:

bash

--token TOKEN     # Vercel API token (required)
--project NAME    # Project name to monitor (default: auto-detect)
--since MINUTES   # Check deployments from last N minutes (default: 5)
--team-id ID      # Team ID for organization accounts

Integration with OpenClaw#

Note: This skill provides monitoring scripts that output results to stdout. Notifications are handled by OpenClaw's cron delivery system ( delivery.mode: "announce") when configured, not by the scripts themselves. The scripts do not make external API calls for notifications.

As a Cron Job#

Set up the skill to run periodically via OpenClaw's cron system:

javascript

// Example cron job configuration
{
  "name": "Vercel Watchdog",
  "schedule": { "kind": "every", "everyMs": 300000 }, // Every 5 minutes
  "payload": {
    "kind": "agentTurn",
    "message": "Run deployment watchdog check and notify if any failures"
  },
  "delivery": {
    "mode": "announce",
    "channel": "telegram",
    "to": "YOUR_TELEGRAM_CHAT_ID"
  }
}

As a Sub-Agent#

Spawn a sub-agent to handle monitoring:

bash

# Use OpenClaw sessions_spawn to run monitoring in background
openclaw sessions spawn --task "Monitor your site deployment health for next hour" --runtime subagent --label deployment-watchdog

Troubleshooting#

Common Issues#

1. Vercel API authentication fails:
   • Ensure token has deployment:read scope
   • Check if token is expired (create new one at https://vercel.com/account/tokens)
2. Cache freshness indicators missing:
   • Deployment might be cached by CDN
   • Wait a few minutes and retry
   • Check Vercel project settings for cache headers
3. API feed validation fails:
   • Verify API endpoint is accessible
   • Check CORS settings if accessing from different domain
   • Validate JSON structure with jq . <(curl -s API_URL)

Debug Mode#

Enable verbose output to see detailed check results:

bash

./scripts/watchdog-check.sh --verbose

Extending the Skill#

Adding New Checks#

1. Add check function to scripts/watchdog-check.sh
2. Update summary output
3. Test with --verbose flag

Integrating with Other Services#

• Slack notifications: Add webhook integration
• Email alerts: Use himalaya CLI or gog skill
• Dashboard integration: Output JSON for external monitoring systems

References#

See references/ directory for:

• Vercel API documentation
• HTTP cache header specifications
• JSON schema validation examples
• OpenClaw cron job configuration guide