check_crowdsec

Check CrowdSec security agent local API reachability via GET /metrics. Default port 6060 (Prometheus metrics endpoint — no auth required).

SERVERMcp Nettools SOURCEaaronckj/mcp-nettools

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/aaronckj-mcp-nettools/check-crowdsec.md

WHAT IT DOES

What check_crowdsec does on Mcp Nettools

AI agents call check_crowdsec to retrieve information from Mcp Nettools without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why check_crowdsec is rated Low

This tool performs a read-only HTTP GET request to a metrics endpoint. It retrieves diagnostic information about a security agent's operational status without modifying state, executing code, or deleting data. The lack of authentication and the nature of metrics endpoints (which expose monitoring data intended for observation) confirm this is a benign Read category operation.

From the tool's definition GET /metrics endpoint that retrieves Prometheus metrics from the CrowdSec agent; described as 'Check...reachability' — a query operation with no auth required and no side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs check_crowdsec safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp Nettools, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For check_crowdsec, this is the rule to start with:

check_crowdsec Allowed

check_crowdsec is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Nettools, apply this rule, and every check_crowdsec call is checked against it from then on.

FAQ

Questions about check_crowdsec

What does the check_crowdsec tool do? +

Check CrowdSec security agent local API reachability via GET /metrics. Default port 6060 (Prometheus metrics endpoint — no auth required). It is categorised as a Read tool in the Mcp Nettools MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on check_crowdsec? +

Register the Mcp Nettools MCP server in PolicyLayer and add a rule for check_crowdsec: 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 Nettools. Nothing to install.

What risk level is check_crowdsec? +

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

Can I rate-limit check_crowdsec? +

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

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

check_crowdsec is provided by the Mcp Nettools MCP server (aaronckj/mcp-nettools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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