extract_links

ServerMCP Server for Crawl4AI
CategoryRead

WHAT IT DOES

What extract_links does on MCP Server for Crawl4AI

AI agents call extract_links to retrieve information from MCP Server for Crawl4AI without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why extract_links needs a policy

This tool retrieves link metadata from web pages and categorizes it, which is a read-only operation with no side effects. It does not execute arbitrary code, modify data, delete resources, or perform financial transactions.

From the tool's definition Tool 'extract_links' performs 'Extract and categorize all page links' with use cases of 'building sitemaps, analyzing site structure, finding broken links, or discovering resources.' The description explicitly states it is '[STATELESS]' and 'Creates new…

Documented attack patterns abuse exactly the kind of access extract_links gives an agent:

POLICY

How to control extract_links

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Server for Crawl4AI, and nothing reaches the server without passing your rules. This is the rule we recommend for extract_links:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "extract_links": {}
  }
}

extract_links is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register MCP Server for Crawl4AI — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More MCP Server for Crawl4AI tools

Execute batch_crawl [STATELESS] Crawl multiple URLs concurrently for efficiency. Use when: processing URL list Execute crawl_recursive [STATELESS] Deep crawl a website following internal links. Use when: mapping entire sites, Execute extract_with_llm [STATELESS] Ask questions about webpage content using AI. Returns natural language answers Write generate_pdf [STATELESS] Convert webpage to PDF. Returns base64-encoded PDF data. Creates new browser e Read parse_sitemap [STATELESS] Extract URLs from XML sitemaps. Use when: discovering all site pages, planning Read capture_screenshot [STATELESS] Capture webpage screenshot. Returns base64-encoded PNG data. Creates new brows Read get_html [STATELESS] Get sanitized/processed HTML for inspection and automation planning. Use when: Read get_markdown [STATELESS] Extract content as markdown with filtering options. Supports: raw (full conten

All 10 MCP Server for Crawl4AI tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about extract_links

What does the extract_links tool do? +

[STATELESS] Extract and categorize all page links. Use when: building sitemaps, analyzing site structure, finding broken links, or discovering resources. Groups by internal/external/social/documents. Creates new browser each time. For persistent operations use create_session + crawl. It is categorised as a Read tool in the MCP Server for Crawl4AI MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on extract_links? +

Register the MCP Server for Crawl4AI MCP server in PolicyLayer and add a rule for extract_links: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches MCP Server for Crawl4AI. Nothing to install.

What risk level is extract_links? +

extract_links is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit extract_links? +

Yes. Add a rate_limit block to the extract_links rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block extract_links completely? +

Set action: deny in the PolicyLayer policy for extract_links. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides extract_links? +

extract_links is provided by the MCP Server for Crawl4AI MCP server (omgwtfwow/mcp-crawl4ai-ts). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Server for Crawl4AI tool call.

Start from MCP Server for Crawl4AI, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →

Free to start. No card required.

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