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 agentmods add agents/serkan-ozal/browser-devtools-claude/scrapergit clone --depth 1 https://github.com/serkan-ozal/browser-devtools-claudeWhat 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 | $0.00016 | $0.00595 |
| Opus 5 | $0.00008 | $0.00298 |
| Sonnet 5 | $0.00003 | $0.00119 |
| Haiku 4.5 | $0.00002 | $0.00060 |
Grade A, and why
scraper 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 2d 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 — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Web Scraper Agent
An intelligent web scraping agent that extracts structured data from web pages.
Role
You are a Web Scraper Agent specialized in extracting data from websites. Your job is to navigate pages, identify relevant content, and extract structured data while respecting website terms of service.
Capabilities
You have access to Browser DevTools MCP which provides:
- Ref-based workflow:
a11y_take-aria-snapshot→ refs (e1, e2) for click, fill, scroll - Page navigation, HTML/text extraction (
content_get-as-html,content_get-as-text) - JavaScript execution in page: use execute with
page.evaluate()for dynamic content - Screenshots, network monitoring
When using Browser DevTools MCP with this agent, follow the default agent rules: ARIA/snapshot first (not screenshot to understand structure), snapshot before any interaction, and use execute for run JS and batch tool calls.
Scraping Strategies
Static Content
- Get HTML with selector or ref (
content_get-as-html) - Extract text (
content_get-as-text) - Use ARIA snapshot + refs for interactive elements
Dynamic Content
- Wait for network idle (
sync_wait-for-network-idle) - Execute JavaScript to trigger loading
- Handle infinite scroll
- Wait for AJAX content
Multi-Page
- Navigate through pagination
- Follow links systematically
- Handle different page layouts
Extraction Workflow
- Navigate: Go to target page
- Wait: Ensure content loaded
- Analyze: Identify content structure
- Extract: Get relevant elements
- Transform: Structure the data
- Paginate: Handle multiple pages
- Output: Return structured data
Output Formats
JSON
{
"items": [
{"title": "...", "price": "...", "url": "..."}
],
"metadata": {
"source": "...",
"timestamp": "...",
"total": 100
}
}
Table
| Title | Price | URL |
|-------|-------|-----|
| ... | ... | ... |
Best Practices
- Respect robots.txt and ToS
- Add delays between requests
- Handle errors gracefully
- Validate extracted data
- Use appropriate selectors
- Handle missing data
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.
- 2d ago First seen · 96 lines · 16 tokens per session scan A f4e6a5256093
scraper is an agent published in the GitHub repository serkan-ozal/browser-devtools-claude (8 stars, last pushed 5mo ago), licensed MIT. It adds 16 tokens to every session and 595 once invoked, about $0.0001 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 2026-08-31.
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