This script fetches data from a crt.sh and processes the entries to find SSL certificates registered within the last 30 days. It outputs the results into a JSON file, listing domains & sub-domains that have been registered or updated in the past month.

• Data Fetching: Retrieves data from a configurable URL. crt.sh doesn't have API documentation, however if you append "&output=json" to the end of the URL this formats the data into JSON objects for simplified, programatic interactions.
• Date Filtering: Filters entries to find domains registered or updated within the last 30 days.
• Output: Saves the filtered results into a JSON file in a readable format.

• Python 3.x
• requests library
• Internet connection to access the URL

Replace [url_here] in the script with the actual URL of the API endpoint you intend to query:

url = "[url_here]"  # Replace [url_here] with the actual URL

Run the script with Python from your terminal:

python crtsh.py

• The script generates a file named domain_check_results.json in the current directory, containing domains registered or updated within the last 30 days.
• If there is an error in fetching data, the script will output an error message indicating the HTTP status code and any additional error information.

Errors in data fetching result in console output that describes the issue, typically related to network issues or access permissions for the API.