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Certificate log

An MCP tool from the Web and Network server, hosted on mcp.hjlabs.in.

List TLS certificates issued for a domain from Certificate Transparency logs (Cert Spotter): issuer, validity dates, and every DNS name each certificate covers, including subdomains. Use it to discover subdomains or check that a renewal happened.

Name on the gateway: web__certificate_log · read-only.

Parameters

NameTypeDescription
domain requiredstringDomain, e.g. "example.com".
include_subdomainsbooleanAlso certificates for subdomains (default true).
limitintegerMost certificates to return (default 20, max 50).

How to call it

Through the Smart Gateway, any client can run it by name with call_tool, or let the gateway find it with search_tools:

call_tool arguments
{
  "name": "web__certificate_log",
  "arguments": {
    "domain": "…"
  }
}

Or connect the Web and Network server directly, which lists 22 tools including this one:

Run in your terminal
claude mcp add --transport http hj-web https://mcp.hjlabs.in/mcp/web \
  --header "Authorization: Bearer YOUR_API_KEY"

Try asking

Use the certificate log tool with domain set to ….

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