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ctlogs.dev — Certificate Transparency search

MCP serverVerified domain · ctlogs.devRemote● LiveFree to try

Search Certificate Transparency logs: subdomains, TLS certificates, organizations, CAs.

Install

Remote server: your requests and data go to mcp.ctlogs.dev. Claude Code: claude mcp add --transport http ctlogs-dev-certificate-transparency-sear https://mcp.ctlogs.dev/mcp · Claude app: Settings → Connectors → Add custom connector.

What it can do

The tools this server listed when we connected to it, in its own words.

  • 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.
  • get_ca — Return one issuing CA certificate by its SHA-256 fingerprint (the issuer_ca field of get_certificate): subject, issuer, validity, parent and
  • get_certificate — Return the full record of one certificate: subject, issuer, serial number, validity, DNS names, key and signature details, the CT log entrie
  • search_certificates — List TLS certificates issued for a domain name: id, matching names, issuer, serial number and validity dates. By default matches the exact n
  • search_organization — List TLS certificates whose subject organization matches a name, e.g. "PayPal, Inc.": id, subject common name, domains, issuer and validity

KitScout test notes

Not tested by KitScout yet. When our harness runs it, pros, cons and the tasks we tried appear here, with the date and evidence.

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