crtsh-search-certificates

Search certificate transparency records for a domain or query string.

SERVERMeta Data Mcp SOURCEpypi:meta-data-mcp

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/io-github-derekslinz-meta-data-mcp/crtsh-search-certificates.md

WHAT IT DOES

What crtsh-search-certificates does on Meta Data Mcp

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

RISK

Why crtsh-search-certificates is rated Low

Certificate transparency logs are public records designed for lookups and verification. This tool performs read-only queries against open data sources (CRTSH, a public database) and returns results without creating, modifying, or deleting data. The blast radius of misuse is minimal: an attacker could enumerate certificates for a target domain, but this information is already publicly available and indexed.

From the tool's definition Tool name contains 'search' and description states 'Search certificate transparency records'—a query operation that retrieves public data without modification or side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs crtsh-search-certificates safely

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

crtsh-search-certificates Allowed

crtsh-search-certificates 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": {
    "crtsh-search-certificates": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect Meta Data Mcp, apply this rule, and every crtsh-search-certificates call is checked against it from then on.

FAQ

Questions about crtsh-search-certificates

What does the crtsh-search-certificates tool do? +

Search certificate transparency records for a domain or query string. It is categorised as a Read tool in the Meta Data Mcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on crtsh-search-certificates? +

Register the Meta Data MCP server in PolicyLayer and add a rule for crtsh-search-certificates: 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 Meta Data Mcp. Nothing to install.

What risk level is crtsh-search-certificates? +

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

Can I rate-limit crtsh-search-certificates? +

Yes. Add a rate_limit block to the crtsh-search-certificates 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 crtsh-search-certificates completely? +

Set action: deny in the PolicyLayer policy for crtsh-search-certificates. 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 crtsh-search-certificates? +

crtsh-search-certificates is provided by the Meta Data MCP server (pypi:meta-data-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Meta Data, and thousands of servers like it.

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Roll out MCP under one policy →Data exfiltration →MCP token cost →