tls_ct_logs
Certificate Transparency log lookup via crt.sh
How to use it
Project documentation lists tls_ct_logs for the Fingerprint MCP MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), then check which tools your installed version makes available. Tool availability can depend on configuration and credentials. A server handshake does not verify this tool’s behavior. See the full listing for setup details.
Install Fingerprint MCP
npx -y fingerprint-mcpOther tools in Fingerprint MCP (39)
CAA record analysis for certificate authority restrictions
SPF, DKIM, and DMARC record analysis
Full record enumeration — A, AAAA, MX, NS, TXT, CNAME, SOA
SaaS/service detection via CNAME and MX patterns (Slack, Zendesk, etc.)
DNS server fingerprinting (BIND, PowerDNS, Cloudflare, etc.)
Subdomain takeover detection via dangling CNAME analysis
Zone transfer attempt (AXFR)
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Port combination analysis and service inference
Banner grabbing on open ports for service identification
TCP connect scan to detect open ports
X.509 certificate parsing — subject, issuer, SANs, validity, chain
Cipher suite enumeration and strength analysis
JA4X passive TLS fingerprinting from certificate properties
JARM active fingerprinting — 10 TLS Client Hello probes, 62-char hash
OCSP stapling and revocation status check
Supported TLS protocol version detection (SSLv3 through TLS 1.3)
SNI behavior testing — default cert vs. requested hostname
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