peerglass_ct_logs
Search Certificate Transparency logs to discover TLS certificates issued for a domain, revealing subdomains, issuer CAs, and validity periods for security audits and incident investigations.
Instructions
Search crt.sh for all TLS certificates ever issued for a domain via Certificate Transparency logs. Returns deduplicated entries showing common name, issuer CA, validity period, and SAN name_value.
Useful for:
Discovering shadow IT / undocumented subdomains
Auditing which CAs have been used for a domain
Finding certificates issued before/after security incidents
Verifying certificate rotation
Args: params (CTLogInput): - domain (str): Domain name (e.g. 'cloudflare.com') - limit (int): Max entries to return (default 50, max 500) - response_format (str): 'markdown' (default) or 'json'
Returns: str: Certificate log table with CN, CA, validity dates, and unique CA summary.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| params | Yes |
Output Schema
| Name | Required | Description | Default |
|---|---|---|---|
| result | Yes |