ctlogs.dev — Certificate Transparency search

Connect Remote server

claude mcp add --transport http certificate-transparency https://mcp.ctlogs.dev/mcp

{
  "mcpServers": {
    "certificate-transparency": {
      "url": "https://mcp.ctlogs.dev/mcp"
    }
  }
}

{
  "servers": {
    "certificate-transparency": {
      "type": "http",
      "url": "https://mcp.ctlogs.dev/mcp"
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://mcp.ctlogs.dev/mcp

Tools 5 found in our last check

• find_subdomains

  List the hostnames found under a domain in TLS certificates: one row per hostname with the number of certificates and first/last seen dates. Covers certificates valid now or expired within the last 90 days; set history to true for every hostname certified since 2013 (needs an AP…

• get_ca

  Return one issuing CA certificate by its SHA-256 fingerprint (the issuer_ca field of get_certificate): subject, issuer, validity, parent and cross-signed certificates, the number of certificates it issued and a page of them.

• get_certificate

  Return the full record of one certificate: subject, issuer, serial number, validity, DNS names, key and signature details, the CT log entries that recorded it and download URLs for the certificate body. id is the id field of a search result or the certificate's SHA-256 fingerpri…

• search_certificates

  List TLS certificates issued for a domain name: id, matching names, issuer, serial number and validity dates. By default matches the exact name; set include_subdomains to true to also match every name under it. Covers certificates valid now or expired within the last 90 days unl…

• search_organization

  List TLS certificates whose subject organization matches a name, e.g. "PayPal, Inc.": id, subject common name, domains, issuer and validity dates. Covers certificates valid now or expired within the last 90 days unless archive is set to "full" or a year from 2013 (needs an API k…

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