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Subdomain Finder API (Jsmon)

subdomains.jsmon.sh
Visit subdomains.jsmon.sh
Category
Cybersecurity
Rank
No. 1346Tools index
Pricing
Freemium
Platform
web
Type
TOOL
Date

About

An API that returns every publicly observed subdomain for a given domain, drawing from a database of 3.5 billion subdomains sourced from certificate transparency logs, DNS records, and web crawling. It targets security researchers, red teams, and bug bounty hunters, with a free tier (3 queries/day) and paid tiers up to 50,000 queries/month.

What it can do

  • Return all publicly observed subdomains for a given domain

    Domain name → List of subdomains

Why it made the leaderboard

It gives security engineers a single-call way to pull historical subdomain data for attack-surface reconnaissance instead of running their own CT-log and DNS scraping pipelines.

Tags

subdomain-enumerationosintapibug-bountyattack-surfacereconsecurity

Media

Subdomain Finder API (Jsmon)

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