ctlogs.dev - Certificate Transparency Search
ctlogs.dev searches the public Certificate Transparency logs, where every publicly trusted TLS certificate is recorded.
Connected to it, your AI can answer questions such as "which subdomains does example.com have", "who issued the certificates for this name" or "which domains does this company hold certificates for". Tools (all read-only):
MCP connector
- Server URL
https://mcp.ctlogs.dev/mcp- Login
- API key
- Protocol
- MCP 2026-07-28
- Instructions
Ctlogs.dev searches TLS certificates recorded in the public Certificate Transparency logs. Unless a tool says otherwise, results cover certificates that are valid now or expired within the last 90 days. To enumerate the hostnames of a domain use ; to list certificates use (by domain) or (by subject organization); pass an id from those results to , and its issuer_ca to . List results are paged: when has_more is true, call the same tool again with the returned next_cursor.
Tools
Reads data5
Skills
None in the store listings or on the server