Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add JansenAnalytics/claudex --skill web-monitorgit clone --depth 1 https://github.com/JansenAnalytics/claudexWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/jansenanalytics/claudex/web-monitor)<a href="https://agentmods.dev/skills/jansenanalytics/claudex/web-monitor"><img src="https://agentmods.dev/badge/skills/jansenanalytics/claudex/web-monitor/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/jansenanalytics/claudex/web-monitor"><img src="https://agentmods.dev/badge/skills/jansenanalytics/claudex/web-monitor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00026 | $0.00323 |
| Opus 5 | $0.00013 | $0.00161 |
| Sonnet 5 | $0.00005 | $0.00065 |
| Haiku 4.5 | $0.00003 | $0.00032 |
Grade B, and why
web-monitor scanned grade B with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Sends data to an external URLmediumData exfiltration
A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.
*/5 * * * * curl -s URL | grep -qi "in stock" && curl -d "Item is in stock!" ntfy.sh/YOUR_TOPIC Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s URL | grep -qi "SEARCH_TEXT" && echo "FOUND" || echo "NOT FOUND" What it actually says
Web Monitor
Check websites for changes and alert via Telegram or ntfy.
Quick URL Check
# Check if page contains text
curl -s URL | grep -qi "SEARCH_TEXT" && echo "FOUND" || echo "NOT FOUND"
# Check HTTP status
curl -s -o /dev/null -w "%{http_code}" URL
# Get page title
curl -s URL | grep -oP '(?<=<title>).*?(?=</title>)'
# Check price (extract number near keyword)
curl -s URL | grep -oP '\d+[\.,]\d+' | head -5
Persistent Monitoring
For repeated checks, create a cron-based monitor:
# Check every 5 minutes
*/5 * * * * curl -s URL | grep -qi "in stock" && curl -d "Item is in stock!" ntfy.sh/YOUR_TOPIC
Check Types
- text-absent — Alert when text disappears (e.g., "sold out" gone = in stock)
- text-present — Alert when text appears
- http-status — Alert on status change
- price-drop — Alert when price below threshold
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 7d ago First seen · 41 lines · 26 tokens per session scan B 24f8b0c4f644
web-monitor is a skill published in the GitHub repository JansenAnalytics/claudex (5 stars, last pushed 2mo ago), licensed MIT. It adds 26 tokens to every session and 323 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 2 findings (sends data to an external url, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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