Get list of CT logs, then ask how many total certs they have.

list_ct.py

import requests
import json
import locale

def set_locale():
    locales_to_try = ['en_US.UTF-8', 'en_US.utf8', 'English_United States.1252']
    for loc in locales_to_try:
        try:
            locale.setlocale(locale.LC_ALL, loc)
            return True
        except locale.Error:
            continue
    return False

locale_set = set_locale()

ctl_log = requests.get('https://www.gstatic.com/ct/log_list/v3/log_list.json').json()

total_certs = 0

def human_format(number):
    if locale_set:
        return locale.format_string('%d', number, grouping=True)
    else:
        # Locale not set, fallback to manual formatting
        return "{:,}".format(number)

#human_format = lambda x: locale.format_string('%d', x, grouping=True)

# Accessing 'logs' key under 'operators'
for operator in ctl_log['operators']:
    for log in operator['logs']:
        log_url = log['url']
        # Remove extra 'https://' prefix
        log_url = log_url.replace('https://', '')
        state = log.get('state', {}).get('usable', False)
        if state:
            try:
                # Remove the extra slash from the URL
                if log_url.endswith('/'):
                    log_url = log_url[:-1]
                log_info = requests.get('https://{}/ct/v1/get-sth'.format(log_url), timeout=3)
                log_info.raise_for_status()  # Raise an error for bad status codes
                log_info_json = log_info.json()
                total_certs += int(log_info_json['tree_size'])
                print("{} has {} certificates".format(log_url, human_format(log_info_json['tree_size'])))
            except requests.exceptions.RequestException as e:
                print("Error fetching data from {}: {}".format(log_url, e))
                if hasattr(e, 'response') and e.response:
                    print("Response content: {}".format(e.response.text))  # Print response content
            except (json.decoder.JSONDecodeError, KeyError) as e:
                print("Error processing data from {}: {}".format(log_url, e))
        else:
            print("Skipping {} as it is not in a usable state.".format(log_url))

print("Total certs -> {}".format(human_format(total_certs)))

python3 list2_ct.py
                                     
ct.googleapis.com/logs/us1/argon2024 has 1,104,818,063 certificates
ct.googleapis.com/logs/us1/argon2025h1 has 50,453,804 certificates
ct.googleapis.com/logs/us1/argon2025h2 has 87,737 certificates
ct.googleapis.com/logs/eu1/xenon2024 has 1,231,206,046 certificates
ct.googleapis.com/logs/eu1/xenon2025h1 has 39,953,362 certificates
ct.googleapis.com/logs/eu1/xenon2025h2 has 87,553 certificates
ct.cloudflare.com/logs/nimbus2024 has 490,364,786 certificates
ct.cloudflare.com/logs/nimbus2025 has 13,150,925 certificates
yeti2024.ct.digicert.com/log has 651,108,976 certificates
yeti2025.ct.digicert.com/log has 42,052,711 certificates
Skipping nessie2024.ct.digicert.com/log/ as it is not in a usable state.
nessie2025.ct.digicert.com/log has 23,927,499 certificates
sabre.ct.comodo.com has 480,535,688 certificates
sabre2024h1.ct.sectigo.com has 128,580,534 certificates
sabre2024h2.ct.sectigo.com has 192,431 certificates
sabre2025h1.ct.sectigo.com has 461,491 certificates
sabre2025h2.ct.sectigo.com has 87,275 certificates
Skipping mammoth.ct.comodo.com/ as it is not in a usable state.
Skipping mammoth2024h1.ct.sectigo.com/ as it is not in a usable state.
Skipping mammoth2024h1b.ct.sectigo.com/ as it is not in a usable state.
mammoth2024h2.ct.sectigo.com has 191,295 certificates
mammoth2025h1.ct.sectigo.com has 471,046 certificates
mammoth2025h2.ct.sectigo.com has 87,268 certificates
oak.ct.letsencrypt.org/2024h1 has 594,061,811 certificates
oak.ct.letsencrypt.org/2024h2 has 80,125,796 certificates
oak.ct.letsencrypt.org/2025h1 has 26,371,345 certificates
oak.ct.letsencrypt.org/2025h2 has 142,585 certificates
ct2024.trustasia.com/log2024 has 23,782,307 certificates
ct2025-a.trustasia.com/log2025a has 448,933 certificates
ct2025-b.trustasia.com/log2025b has 403,157 certificates
Total certs -> 4,983,154,424

Initial code from here: https://medium.com/cali-dog-security/parsing-certificate-transparency-lists-like-a-boss-981716dc506