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 market-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/market-monitor)<a href="https://agentmods.dev/skills/jansenanalytics/claudex/market-monitor"><img src="https://agentmods.dev/badge/skills/jansenanalytics/claudex/market-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/market-monitor"><img src="https://agentmods.dev/badge/skills/jansenanalytics/claudex/market-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 | $0.00054 | $0.00867 |
| Opus 5 | $0.00027 | $0.00434 |
| Sonnet 5 | $0.00011 | $0.00173 |
| Haiku 4.5 | $0.00005 | $0.00087 |
Grade A, and why
market-monitor scanned grade A with 0 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 8d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Market Monitor Skill
Use when: watching competitors, tracking releases, monitoring job postings, or detecting content changes on any URL with intelligent signal extraction.
Add a monitor
node ${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/add-monitor.cjs \
--name "Name" --url "https://..." --type <type> [options]
Types
price-change— extracts price values, alerts on change. Use--price-regex "\$[\d,]+"release-watch— detects new version strings (semver)hiring-signal— detects new job titles on careers pagescontent-diff— diffs full page content, alerts on significant change (>3 lines)keyword-watch— watches for keywords appearing/disappearing. Use--keywords "word1,word2"
Type-specific options
| Type | Required option |
|---|---|
| price-change | --price-regex "\$[\d,]+" (optional, has default) |
| keyword-watch | --keywords "kw1,kw2,kw3" (required) |
Optional flags
--interval <minutes>— check interval (default: 60)--disabled— add in disabled state
Examples
# Price tracking
node ${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/add-monitor.cjs \
--name "Competitor Pricing" --url "https://competitor.com/pricing" \
--type price-change --price-regex "\$[\d,]+" --interval 60
# Release tracking
node ${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/add-monitor.cjs \
--name "My Lib Releases" --url "https://github.com/owner/repo/releases" \
--type release-watch --interval 120
# Hiring signals
node ${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/add-monitor.cjs \
--name "OpenAI Careers" --url "https://openai.com/careers" \
--type hiring-signal --interval 240
# Keyword watch
node ${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/add-monitor.cjs \
--name "HN mentions" --url "https://news.ycombinator.com" \
--type keyword-watch --keywords "sqlite,htmx,openclaw"
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 8d ago First seen · 101 lines · 54 tokens per session scan A 2c302724fb2c
market-monitor is a skill published in the GitHub repository JansenAnalytics/claudex (5 stars, last pushed 2mo ago), licensed MIT. It adds 54 tokens to every session and 867 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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