Sonar

API

Free DNS enumeration API for security research and development

Overview

The Sonar API provides access to Project Sonar's extensive DNS dataset, enabling queries for various DNS records (A, AAAA, MX, TXT, NS) and reverse DNS lookups. Responses are formatted in JSON, with data including record types, values, and domain associations. Use cases include security research (subdomain discovery for penetration testing), validating application DNS configurations, threat intelligence (identifying malicious domains), and network monitoring to track domain changes. It leverages large-scale periodic scans to offer comprehensive historical and current DNS data.

Example Integration (JavaScript)

script.js JS


fetch('https://github.com/Cgboal/SonarSearch')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Key Features

DNS record querying
Reverse DNS lookups
JSON response format
No API key required
Extensive historical DNS data

Frequently Asked Questions

? Is Sonar free to use?

Yes, Sonar is free for non-commercial and research purposes, with rate limits applied to prevent abuse.

? Does it require an API Key?

No, the Sonar API does not require an API key for access, though rate limits may apply based on your usage patterns.

? What is the response format?

The Sonar API returns responses in JSON format, containing detailed DNS record information such as type, value, and associated domain metadata.

Top Alternatives

SecurityTrails DNS API Search Google

Censys DNS Enumeration API Search Google

Tool Info

Pricing Free

Category Development

Platform Public API

Pros

⊕ Free access to large DNS dataset
⊕ Easy integration with tools
⊕ Supports multiple DNS record types
⊕ Useful for security and research tasks

Cons

⊖ Rate-limited usage
⊖ No official service level agreement (SLA)
⊖ Data may not be real-time
⊖ Limited formal documentation