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 0xMassi/webclaw-skill --skill webclawgit clone --depth 1 https://github.com/0xMassi/webclaw-skillWrote 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/0xmassi/webclaw-skill/webclaw)<a href="https://agentmods.dev/skills/0xmassi/webclaw-skill/webclaw"><img src="https://agentmods.dev/badge/skills/0xmassi/webclaw-skill/webclaw/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/0xmassi/webclaw-skill/webclaw"><img src="https://agentmods.dev/badge/skills/0xmassi/webclaw-skill/webclaw.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 | $0.00101 | $0.01728 |
| Opus 5.5 | $0.00040 | $0.00691 |
| Sonnet 5.5 | $0.00020 | $0.00346 |
| Haiku 4.5 | $0.00010 | $0.00173 |
Grade A, and why
webclaw 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 1mo 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.
The source is not reproduced here
Licensed AGPL-3.0
The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
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.
- 1mo ago Changed · -7 lines 59802d09dac4
- 1mo ago First seen · 113 lines · 101 tokens per session scan A e5ef43a1a281
webclaw is a skill published in the GitHub repository 0xMassi/webclaw-skill (3 stars, last pushed 1mo ago), licensed AGPL-3.0. It adds 101 tokens to every session and 1,728 once invoked, about $0.0004 per session on Opus 5.5. 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.
Other skills, from other repositories
marking-up-pages
Let the user draw on a live web page in Chrome (circle, underline, arrow) and type a note per mark, then read back what each mark points at - element, selector, computed styles, React/Vue/Svelte component and source file - plus console errors and failed requests, and fix it. Uses Claude in Chrome. Use when the user…
creating-bookmarklets
Creates browser-executable JavaScript bookmarklets with strict formatting requirements. Use when users mention bookmarklets, browser utilities, dragging code to bookmarks bar, or need JavaScript that runs when clicked in the browser toolbar.
using-webctl
Browser automation via webctl CLI in Claude.ai containers with authenticated proxy support. Use when users mention webctl, browser automation, Playwright browsing, web scraping, or headless Chrome in container environments.
fetching-blocked-urls
Retrieve clean markdown from URLs when webfetch fails. Converts pages via Jina AI reader service with automatic retry. Use when webfetch or curl returns 403, blocked, paywall, timeout, JavaScript-rendering errors, or empty content or user explicitly suggests using jina.
download-xhs-videos
A process for downloading a Xiaohongshu creator’s videos to a local folder. Xiaohongshu, also called RedNote, is a Chinese social-media platform.
add-tavily-tool
Add Tavily Search and Extract as keyless remote MCP tools for selected NanoClaw agent groups. Use when installing Tavily web search or URL extraction without an API key.