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SecurityTrails API

APIs for Security Companies, Researchers and Teams

Fast, always up API that allows you to access current and historical data. The API is paid via a simple pricing structure that allows you to embed our data into your applications.

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All the data you need, in one place

3.4 Trillion

Historical DNS lookups

3 Billion

Historical WHOIS records

1.3 Billion

Total hostnames tracked

418 Million

Total Domains tracked

Attack Surface Reduction

Manage, Monitor and Contain your Critical Data

Attack Surface Reduction

As your organization infrastructure grows day by day, your attack surface becomes more difficult to manage. Attack Surface Reduction solves this problem.

Get full control of all your online assets:

  • Find open ports
  • Explore vulnerabilities
  • Build your IP map
  • Perform a full domain enumeration
  • Discover all your subdomains
  • Extract SSL data from all your domains

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Security health from a distance

Instantly click through the external internet surface area of any company from a single unified web interface. Discover all your exposed data before the bad guys do.

Main features include:

  • DNS Time Machine™
  • Reverse IP data
  • IP intelligence
  • Full internet scans
  • SSL transparency logs
  • WhoWas™ smart WHOIS history

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Security health from a distance

Domain Intelligence Feeds

High-quality domain feeds for data enrichment

Domain Intelligence Feeds

Our daily updated and curated domain, IP and DNS data feeds are available in CSV format or API and easily integrated into your own apps.

Jump to the next level of cybersecurity feeds instantly.

Includes full access to:

  • Port scans
  • Domain attribution
  • List of all domains
  • List of subdomains
  • SPF + DMARC scans
  • Certificate transparency logs

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See what our customers are saying about us

Picture of Ben Dowling

"We spent a ton of time and effort building out our own domain lists, but we gave up when we found SecurityTrails – the data was better than anything else we've seen, and allowed us to focus on our core product."

Ben Dowling
Picture of Bill Ladd

"SecurityTrails solves the headache of accurately mapping a company's footprint with data you can't find anywhere else. If you are a security analyst or developer, you will get tremendous value from the most current domain intel through their API."

Bill Ladd

"SecurityTrails is my source of truth when it comes to threat hunting and research. The speed of the API is crazy and the integrations with automation tools and SIEM tools makes it an easy choice."

Mickey Perre

Get started now!

Use SecurityTrails API to fetch any domain and whois related data: Our easy to use API can help you enriching your datasets or adding value to your service.

Signup for an API key


7 days. 49 dollars. Full access.

7-day trial gives you full access to all tools and features of SurfaceBrowser.


Start 7-day trial for $49. Then $499/month
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