---
title: Certificate Transparency Insights in Cloudflare Radar
description: New Certificate Transparency (CT) insights in Cloudflare Radar, with new API endpoints for certificate issuance trends
image: https://edgetunnel-b2h.pages.dev/changelog-preview.png
---

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## Certificate Transparency Insights in Cloudflare Radar

Aug 06, 2025 

[ Radar ](https://edgetunnel-b2h.pages.dev/radar/) 

[**Radar**](https://edgetunnel-b2h.pages.dev/radar/) now introduces Certificate Transparency (CT) insights, providing visibility into certificate issuance trends based on Certificate Transparency logs currently monitored by Cloudflare.

The following API endpoints are now available:

* [/ct/timeseries](https://edgetunnel-b2h.pages.dev/api/resources/radar/subresources/ct/methods/timeseries/): Retrieves certificate issuance time series.
* [/ct/summary/{dimension}](https://edgetunnel-b2h.pages.dev/api/resources/radar/subresources/ct/methods/summary/): Retrieves certificate distribution by dimension.
* [/ct/timeseries\_groups/{dimension}](https://edgetunnel-b2h.pages.dev/api/resources/radar/subresources/ct/methods/timeseries%5Fgroups/): Retrieves time series of certificate distribution by dimension.
* [/ct/authorities](https://edgetunnel-b2h.pages.dev/api/resources/radar/subresources/ct/subresources/authorities/methods/list/): Lists certification authorities.
* [/ct/authorities/{ca\_slug}](https://edgetunnel-b2h.pages.dev/api/resources/radar/subresources/ct/subresources/authorities/methods/get/): Retrieves details about a Certification Authority (CA). CA information is derived from the [Common CA Database (CCADB) ↗](https://www.ccadb.org/).
* [/ct/logs](https://edgetunnel-b2h.pages.dev/api/resources/radar/subresources/ct/subresources/logs/methods/list/): Lists CT logs.
* [/ct/logs/{log\_slug}](https://edgetunnel-b2h.pages.dev/api/resources/radar/subresources/ct/subresources/logs/methods/get/): Retrieves details about a CT log. CT log information is derived from the [Google Chrome log list ↗](https://googlechrome.github.io/CertificateTransparency/log%5Flists.html).

For the `summary` and `timeseries_groups` endpoints, the following dimensions are available (and also usable as filters):

* `ca`: Certification Authority (certificate issuer)
* `ca_owner`: Certification Authority Owner
* `duration`: Certificate validity duration (between NotBefore and NotAfter dates)
* `entry_type`: Entry type (certificate vs. pre-certificate)
* `expiration_status`: Expiration status (valid vs. expired)
* `has_ips`: Presence of IP addresses in certificate [Subject Alternative Names (SANs) ↗](https://edgetunnel-b2h.pages.dev/ssl/origin-configuration/origin-ca/#hostname-and-wildcard-coverage)
* `has_wildcards`: Presence of wildcard DNS names in certificate SANs
* `log`: CT log name
* `log_api`: CT log API ([RFC6962 ↗](https://datatracker.ietf.org/doc/html/rfc6962) vs. [Static ↗](https://c2sp.org/static-ct-api))
* `log_operator`: CT log operator
* `public_key_algorithm`: Public key algorithm of certificate's key
* `signature_algorithm`: Signature algorithm used by CA to sign certificate
* `tld`: Top-level domain for DNS names found in certificates SANs
* `validation_level`: [Validation level ↗](https://www.cloudflare.com/learning/ssl/types-of-ssl-certificates/)

Check out the new Certificate Transparency insights in the [new Radar page ↗](https://radar.cloudflare.com/certificate-transparency).

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