us/crw is a Rust web scraper, crawler, and search API that turns web pages into Markdown or structured JSON, and also provides an MCP server for AI agents. It is for collecting web content through scraping, site crawling, URL discovery, web search, and structured extraction, either as a local binary or managed service. The catalogue add-ons connect coding agents to its API and MCP server.
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 us/crw --skill crw-dynamic-searchgit clone --depth 1 https://github.com/us/crwWrote 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/us/crw/crw-dynamic-search)<a href="https://agentmods.dev/skills/us/crw/crw-dynamic-search"><img src="https://agentmods.dev/badge/skills/us/crw/crw-dynamic-search/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/us/crw/crw-dynamic-search"><img src="https://agentmods.dev/badge/skills/us/crw/crw-dynamic-search.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Memory Poisoning · line 55 Skill attempts to fill the context window with filler content, displacing legitimate instructions and safety constraints. This can degrade agent performance or bypass safety boundaries.Fix: Implement context-window management that detects and rejects padding or stuffing attempts. Prioritize system instructions over user-injected content.
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 | $0.00143 | $0.03685 |
| Opus 5.5 | $0.00057 | $0.01474 |
| Sonnet 5.5 | $0.00029 | $0.00737 |
| Haiku 4.5 | $0.00014 | $0.00368 |
Grade A, and why
crw-dynamic-search scanned grade A with 1 finding 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 2mo 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.
Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
raw = subprocess.check_output( 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.
- 2mo ago First seen · 442 lines · 143 tokens per session scan A ce1411a5f59d
crw-dynamic-search is a skill published in the GitHub repository us/crw (1,149 stars, last pushed 20d ago), licensed AGPL-3.0. It adds 143 tokens to every session and 3,685 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
crw-dynamic-search compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| crw-dynamic-searchus/crw | Skill | 1.1k | 20d ago | AGPL-3.0 | A | 143 | Claude Code |
| firecrawl-buildfirecrawl/firecrawl | Skill | 199k | yesterday | AGPL-3.0 | A | 149 | Claude Code, Codex |
| firecrawl-build-scrapefirecrawl/firecrawl | Skill | 199k | yesterday | AGPL-3.0 | A | 62 | Claude Code, Codex |
| firecrawl-build-interactfirecrawl/firecrawl | Skill | 199k | yesterday | AGPL-3.0 | A | 56 | Claude Code, Codex |
| docsmysleekdesigns/crawlforge-mcp | Skill | 6 | 5d ago | MIT | A | 0 | Claude Code, Codex |
| crawlforge-stealth-browsingmysleekdesigns/crawlforge-mcp | Skill | 6 | 5d ago | MIT | A | 176 | Claude Code, Codex |
| crawlforge-web-scrapingmysleekdesigns/crawlforge-mcp | Skill | 6 | 5d ago | MIT | A | 134 | Claude Code, Codex |