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🦀 ClawHub

Web Monitor

by @corbin-breton

Monitor web pages for content changes and get alerts. Track URLs, detect updates, view diffs. Use when asked to watch a website, track changes on a page, mon...

Versionv1.0.1

Downloads848

#writing #legal

View on ClawHub →

TERMINAL

clawhub install keats-web-monitor

📖 About This Skill

name: web-monitor description: Monitor web pages for content changes and get alerts. Track URLs, detect updates, view diffs. Use when asked to watch a website, track changes on a page, monitor for new posts/content, set up page change alerts, or check if a site has been updated. Supports CSS selectors for targeted monitoring.

Web Monitor

Track web pages for changes. Stores snapshots, computes diffs, supports CSS selectors.

Triggers

Activate this skill when the user wants to:

Watch a website for content changes

Track price changes, new posts, or updated content on a page

Set up page change alerts or notifications

Check if a site has been updated since last visit

Monitor a specific section of a page (with CSS selector)

NOT For

Real-time alerting on dynamic topics — use the topic-monitor skill for news/topic monitoring with importance scoring

Full page archival — this tracks diffs, not full crawl archives

JavaScript-heavy SPAs — the monitor fetches raw HTML; dynamic content rendered by JS may not be captured accurately

Monitoring APIs or webhooks — use cron + exec for structured data endpoints

Quick Start

# Add a URL to watch
uv run --with beautifulsoup4 python scripts/monitor.py add "https://example.com" --name "Example"
Add with CSS selector (monitor specific section)
uv run --with beautifulsoup4 python scripts/monitor.py add "https://example.com/pricing" -n "Pricing" -s ".pricing-table"
Check all watched URLs for changes
uv run --with beautifulsoup4 python scripts/monitor.py check
Check one specific URL
uv run --with beautifulsoup4 python scripts/monitor.py check "Example"
List watched URLs
uv run --with beautifulsoup4 python scripts/monitor.py list
View last diff
uv run --with beautifulsoup4 python scripts/monitor.py diff "Example"
View current snapshot
uv run --with beautifulsoup4 python scripts/monitor.py snapshot "Example" --lines 50
Remove
uv run --with beautifulsoup4 python scripts/monitor.py remove "Example"

Commands

| Command | Args | Description | |---------|------|-------------| | add | [-n name] [-s selector] | Add URL to watch, take initial snapshot | | remove | | Stop watching a URL | | list | [-f json] | List all watched URLs with stats | | check | [url-or-name] [-f json] | Check for changes (all or one) | | diff | | Show last recorded diff | | snapshot | [-l lines] | Show current snapshot |

Output Symbols

🔔 CHANGED — page content changed (shows diff preview)

✅ No changes

📸 Initial snapshot taken

❌ Error fetching

Data

Stored in ~/.web-monitor/ (override with WEB_MONITOR_DIR env var). For OpenClaw workspace integration, set WEB_MONITOR_DIR=$WORKSPACE/data/web-monitor (where $WORKSPACE is your agent workspace path).

watches.json — watch list config

snapshots/ — stored page content + diffs

Tips

Use --selector to monitor specific elements (prices, article lists, etc.)

Use --format json for programmatic checking (heartbeat integration)

CSS selectors require beautifulsoup4 (included via --with flag)

Text is normalized to reduce noise from timestamps, whitespace, ads

💡 Examples

# Add a URL to watch
uv run --with beautifulsoup4 python scripts/monitor.py add "https://example.com" --name "Example"
Add with CSS selector (monitor specific section)
uv run --with beautifulsoup4 python scripts/monitor.py add "https://example.com/pricing" -n "Pricing" -s ".pricing-table"
Check all watched URLs for changes
uv run --with beautifulsoup4 python scripts/monitor.py check
Check one specific URL
uv run --with beautifulsoup4 python scripts/monitor.py check "Example"
List watched URLs
uv run --with beautifulsoup4 python scripts/monitor.py list
View last diff
uv run --with beautifulsoup4 python scripts/monitor.py diff "Example"
View current snapshot
uv run --with beautifulsoup4 python scripts/monitor.py snapshot "Example" --lines 50
Remove
uv run --with beautifulsoup4 python scripts/monitor.py remove "Example"

📋 Tips & Best Practices

Use --selector to monitor specific elements (prices, article lists, etc.)

Use --format json for programmatic checking (heartbeat integration)

CSS selectors require beautifulsoup4 (included via --with flag)

Text is normalized to reduce noise from timestamps, whitespace, ads