SSL Certificate Transparency Scraper

SSL Certificate Transparency Scraper pulls structured data from crt.sh Certificate Transparency Search and returns it as a clean dataset you can export as JSON, CSV or Excel. It queries the public crt.sh certificate transparency database and returns one row per certificate issued for a domain, so you can discover subdomains, spot mis-issuance and track expiries.

No API key, no login. Click Start and it works with the prefilled input.

What does SSL Certificate Transparency Scraper do?

It queries crt.sh Certificate Transparency Search and returns one row per record, with only the fields that matter. Runs on the Apify platform, so you get an API endpoint, scheduling, monitoring and integrations (Zapier, Make, Google Sheets, webhooks) without maintaining any infrastructure.

Why use it?

• crt.sh Certificate Transparency Search data without the plumbing: no proxy setup, no pagination code, no scraping maintenance.
• Schedule it to monitor changes daily or weekly and trigger alerts on new records.
• Feed it straight into a spreadsheet, database, or an AI agent via the Apify API or MCP server.
• Runs in seconds and returns a typed dataset that is ready for analysis.

How to use it

1. Click Try for free / Start.
2. Leave the default input to see a sample run, or type your own values (see Input below).
3. Press Start and wait a few seconds.
4. Open the Output tab and download as JSON, CSV, Excel or HTML.

Input

Field	Type	Default	Description
domain	string	"%.example.com"	Domain to search crt.sh for. Prefix the wildcard %. (e.g. %.example.com) to match all subdomains.
maxResults	integer	25	Maximum number of certificates to return.

Example input:

{
  "domain": "%.example.com",
  "maxResults": 5
}

Output

One item per record. Sample:

{
  "certificate_id": 29557945233,
  "issuer_name": "C=GB, O=Sectigo Limited, CN=Sectigo Public Server Authentication CA DV E36",
  "common_name": "example.com",
  "name_value": "*.example.com\nexample.com",
  "not_before": "2026-09-24T00:00:00",
  "not_after": "2026-12-21T09:32:54"
}

You can download the dataset in various formats such as JSON, HTML, CSV, or Excel.

Data fields

Field	Type	Meaning
certificate_id	integer	Certificate ID
issuer_name	string	Issuer
common_name	string	Common Name
name_value	string	Subject Alt Names
not_before	string	Valid From
not_after	string	Valid To
serial_number	string	Serial Number
issuer_ca_id	integer	Issuer CA ID

How much does it cost to run?

This Actor uses pay-per-event pricing: you pay per result item pushed to the dataset, and nothing for an empty run. Each run is a few seconds of compute, so typical costs are fractions of a cent per run, and the Apify free tier covers plenty of testing.

Tips and advanced options

• Raise maxResults for a bigger pull; the Actor pages through the source for you.
• Schedule it (e.g. every morning) and combine with a webhook to get only the new records.
• Add the Actor to an AI agent through the Apify MCP server for natural-language queries.

FAQ, disclaimers and support

• Is this legal? It uses publicly available data from crt.sh Certificate Transparency Search. You are responsible for how you use the data and for complying with the source's terms.
• It returned nothing? Use a domain such as example.com, or %.example.com to match every subdomain. Very large domains can take a minute.
• Something broken? Open an issue on the Actor's Issues tab. Data sources change and get fixed quickly.
• Need a custom variant (extra fields, a different source, a scheduled report)? Get in touch through the Issues tab.