Certificate transparency quickstart : how to monitor a list of domains?

Question

Context :

I'd like to use transparency logs provided by https://www.certificate-transparency.org to monitor certificate issual for bunch of domains.

Yet, I can't find a way to start.

Question :

Are you aware of a good quickstart / do you have any hints on how to do it ?

Use case :

Watching for example.org in the logs, I'd like to find a way to raise an alarm if something like login.example.org is beeing issued (or any subdomains)

Bonus :

Being able to watch for other RDNs like O=Example Co. Ltd

Answer 1

Google has a client implementation in Python. You can use it to monitor the logs, create a database clone, and then routinely search the database for your entries.