Koskamo

Rat Radar MCP

Rat Radar is an MCP server that allows AI agents to determine if a website permits data collection, assesses the site's hostility towards scrapers, and provides extraction playbooks and X-ray analysis for specific pages without requiring an API key.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Rat Radar MCP logo, by RatLabsVendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-01Operated by RatLabs
MCP endpoint (Streamable HTTP)
https://rat-radar.github-a18.workers.dev/mcp
Vendor documentation

What you can do with it

  • Check if a site is open to scraping
  • Get a data extraction playbook
  • X-ray a page for extraction details
  • Search and list monitored sites

Source and maintenance

Vendor evidenceRegistry 1.4.0

Protocol and capabilities

Server
rat-radar 1.4.0
MCP protocol
2025-06-18
Tools
8 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": false
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Rat Radar tells an agent whether and how a public site can be scraped. Start with check_site (is the site scrapable and how), then can_fetch (may I fetch this URL) and xray_page (how do I extract this page); xray_diagram draws that page as an Excalidraw diagram. search_sites and list_sites show what is covered. Verdicts come from a weekly heuristic probe; always respect robots.txt and site terms.

Tools

8 advertised

check_site
Advertised by the server during the last successful anonymous check.

Can I scrape this site, and how? Returns a verdict (open, guarded, hostile, blocked), a hostility score, a recommended approach with steps and risks, bot protections, robots.txt and AI-crawler policy, machine-readable surfaces (sitemap, llms.txt, JSON-LD), and eu_ai_training: the signals the EDPB draft Guidelines 03/2026 on web scraping for generative AI count against collecting personal data (robots.txt, ai.txt, CAPTCHAs, login walls), as none, some or strong. Signals, not legal advice. Uses a weekly-probed dataset of several hundred sites; for any other domain it probes live from a datacenter IP.

check_site input schema
{
  "type": "object",
  "required": [
    "domain"
  ],
  "properties": {
    "domain": {
      "type": "string",
      "description": "A domain such as reddit.com"
    }
  }
}
get_playbook
Advertised by the server during the last successful anonymous check.

What should I build with this site, and how? Give a domain and, optionally, a goal in plain words (for example "price alerts", "sales leads", "new jobs", "change log", "knowledge base"). Returns the best-matching workflow for that site: what it does, its cadence, a trigger, collect, shape, store, act pipeline, the fields to keep, and step-by-step build recipes for n8n, Make, Zapier and Apify (or just one with platform). Workflows marked found_on_this_site come from what the weekly probe saw on the site itself. Also returns the other workflows, the golden data, and the guardrails.

get_playbook input schema
{
  "type": "object",
  "required": [
    "domain"
  ],
  "properties": {
    "goal": {
      "type": "string",
      "description": "optional, what you want to achieve"
    },
    "domain": {
      "type": "string",
      "description": "A domain such as amazon.com"
    },
    "platform": {
      "enum": [
        "n8n",
        "make",
        "zapier",
        "apify"
      ],
      "type": "string",
      "description": "optional, only return this platform (n8n also returns n8n_workflow, an importable file):'s recipe"
    }
  }
}
list_sites
Advertised by the server during the last successful anonymous check.

List the sites in the dataset, optionally by category or verdict. Use it to find easy targets or to see what is covered.

list_sites input schema
{
  "type": "object",
  "properties": {
    "limit": {
      "type": "integer",
      "description": "default 50, max 200"
    },
    "verdict": {
      "enum": [
        "open",
        "guarded",
        "hostile",
        "blocked"
      ],
      "type": "string"
    },
    "category": {
      "type": "string",
      "description": "e.g. shop, jobs, news, property, travel, gov"
    }
  }
}
xray_page
Advertised by the server during the last successful anonymous check.

How do I extract the data from THIS page? Fetches one public page and returns a ranked extraction plan: embedded JSON, JSON-LD, repeated records with CSS selectors and field names, tables, feeds, hidden API calls. Each source has a reliability, proof rows pulled from the real page, and the plan notes pagination and blockers. Set include_code for a starter Python script. Works on the raw HTML only, so JavaScript-built pages report a blocker instead of data. Use check_site first to learn whether the site allows scraping at all.

xray_page input schema
{
  "type": "object",
  "required": [
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "description": "Full page URL, e.g. https://example.com/products"
    },
    "include_code": {
      "type": "boolean",
      "description": "also return a starter Python script"
    }
  }
}
xray_diagram
Advertised by the server during the last successful anonymous check.

Draw a page's anatomy as an Excalidraw diagram: its regions, the ranked ways to get its data, proof rows, the best route and what the page is made of. Returns a download link for the .excalidraw file (give it to the user; it opens at excalidraw.com or in Obsidian) and a file_name. With include_scene, also the scene itself (a few hundred KB).

xray_diagram input schema
{
  "type": "object",
  "required": [
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "description": "Full page URL, e.g. https://example.com/products"
    },
    "include_scene": {
      "type": "boolean",
      "description": "also return the full Excalidraw scene JSON (large). Default false: just the download link"
    }
  }
}
search_sites
Advertised by the server during the last successful anonymous check.

Find sites in the dataset by a word: a name, host, category (jobs, shop, news, gov), country or verdict. Use it to discover what is covered before calling check_site.

search_sites input schema
{
  "type": "object",
  "required": [
    "query"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "description": "default 25, max 100"
    },
    "query": {
      "type": "string"
    }
  }
}
can_fetch
Advertised by the server during the last successful anonymous check.

Does robots.txt allow fetching this exact URL? Fetches the live robots.txt and applies the longest-match rule for a user agent (default: * plus GPTBot, ClaudeBot, Google-Extended, CCBot, PerplexityBot). Returns allowed or not, the rule that decided it, and any crawl delay. A courtesy check, not a legal opinion.

can_fetch input schema
{
  "type": "object",
  "required": [
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "description": "The full URL you want to fetch"
    },
    "user_agent": {
      "type": "string",
      "description": "optional, e.g. GPTBot"
    }
  }
}
summary
Advertised by the server during the last successful anonymous check.

Headline numbers across the dataset: verdict mix, how many sites block AI crawlers (and which), protection vendors, by category and country.

summary input schema
{
  "type": "object",
  "properties": {}
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
166 ms
95th percentile latency
166 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 166 ms · metadata changed · 8 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http rat-radar-mcp https://rat-radar.github-a18.workers.dev/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add rat-radar-mcp --url https://rat-radar.github-a18.workers.dev/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable rat-radar-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "rat-radar-mcp": {
      "url": "https://rat-radar.github-a18.workers.dev/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "rat-radar-mcp": {
      "type": "streamableHttp",
      "url": "https://rat-radar.github-a18.workers.dev/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start rat-radar-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "rat-radar-mcp": {
      "type": "http",
      "url": "https://rat-radar.github-a18.workers.dev/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http rat-radar-mcp https://rat-radar.github-a18.workers.dev/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.
Claude Desktop configuration
{
  "mcpServers": {
    "rat-radar-mcp": {
      "url": "https://rat-radar.github-a18.workers.dev/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "rat-radar-mcp": {
      "serverUrl": "https://rat-radar.github-a18.workers.dev/mcp"
    }
  }
}

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