Low Risk

check_url

URL / malware safety scan. Checks whether a URL or domain is unsafe — phishing, malware, spam — and returns a risk score, domain reputation rank, content category, DNS validity, and domain age. Example: check_url({ url: "https://example.com" })

Risk signalsAccepts URL/endpoint input (url)

Part of the Ipqualityscore server.

check_url is read-only, but an agent in a loop can still rack up calls and cost. PolicyLayer caps every call before it runs. Live in minutes.

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AI agents call check_url to retrieve information from Ipqualityscore without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.

Even though check_url only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.

Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "check_url": {}
  }
}

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These attack patterns abuse exactly the kind of access check_url gives an agent. Each links to the full case and the policy that stops it:

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Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so check_url only ever does what you allow.

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Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.

What does the check_url tool do? +

URL / malware safety scan. Checks whether a URL or domain is unsafe — phishing, malware, spam — and returns a risk score, domain reputation rank, content category, DNS validity, and domain age. Example: check_url({ url: "https://example.com" }). It is categorised as a Read tool in the Ipqualityscore MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on check_url? +

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

What risk level is check_url? +

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

Can I rate-limit check_url? +

Yes. Add a rate_limit block to the check_url 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_url completely? +

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

check_url is provided by the Ipqualityscore MCP server (https://gateway.pipeworx.io/ipqualityscore/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Ipqualityscore tool call.

Deterministic rules across all 24 Ipqualityscore tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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4,600+ MCP servers and 31,000+ tools scanned and risk-classified.

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