searxng_search

Run a metasearch query via SearXNG and return the top results. SearXNG aggregates answers from multiple engines (Google, DuckDuckGo, Wikipedia, etc.) without tracking.

ServerCrow
CategoryRead

How to control searxng_search ↓

WHAT IT DOES

What searxng_search does on Crow

AI agents call searxng_search to retrieve information from Crow 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 searxng_search needs a policy

This tool performs a search operation that retrieves information from multiple search engines and returns results to the user. It has no side effects, does not modify or delete data, does not execute arbitrary code on the user's system, and does not involve financial transactions. It is purely a read operation that queries external search engines and aggregates their results.

From the tool's definition Tool description states: 'Run a metasearch query via SearXNG and return the top results.' The verb 'return' and 'query' indicate data retrieval without modification. SearXNG is a metasearch aggregator that retrieves and presents search results.

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

POLICY

How to control searxng_search

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

policy.json

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

searxng_search 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 Crow — 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 →

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EXPLORE

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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 searxng_search

What does the searxng_search tool do? +

Run a metasearch query via SearXNG and return the top results. SearXNG aggregates answers from multiple engines (Google, DuckDuckGo, Wikipedia, etc.) without tracking. It is categorised as a Read tool in the Crow MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on searxng_search? +

Register the Crow MCP server in PolicyLayer and add a rule for searxng_search: 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 Crow. Nothing to install.

What risk level is searxng_search? +

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

Can I rate-limit searxng_search? +

Yes. Add a rate_limit block to the searxng_search 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 searxng_search completely? +

Set action: deny in the PolicyLayer policy for searxng_search. 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 searxng_search? +

searxng_search is provided by the Crow MCP server (kh0pper/crow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Crow tool call.

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

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Free to start. No card required.

576 Crow tools catalogued and risk-classified — across an index of 43,000+ MCP servers.