CT Logs

What It Does

Queries Certificate Transparency log aggregators (crt.sh) for recent certificates issued for the domain. Returns up to 20 deduplicated entries with issuer name, log entry timestamp, and crt.sh certificate ID. The truncated field indicates if more entries exist beyond the limit.

Why It's Useful

Recent CT log entries reveal patterns invisible in the active certificate alone: CA changes over time, certificate churn rates, subdomain discovery through historical SANs, and detection of unauthorized issuance. The truncated field indicates when more entries exist beyond the 20-entry limit.

Use Cases

Parameters

Response Fields

Code Examples

curl "https://api.edgedns.dev/v1/domain/ct-logs" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d "domain=example.com"

const response = await fetch(
  'https://api.edgedns.dev/v1/domain/ct-logs?domain=example.com',
  {
    headers: {
      'Authorization': 'Bearer YOUR_API_KEY'
    }
  }
);

const data = await response.json();
console.log(data);

import requests

response = requests.get(
    'https://api.edgedns.dev/v1/domain/ct-logs',
    headers={'Authorization': 'Bearer YOUR_API_KEY'},
    params={
    'domain': 'example.com'
    }
)

data = response.json()
print(data)

Related Endpoints

External References

Learn more about the standards and protocols behind this endpoint.