Overview#

The Subdomain Enumerator is a powerful reconnaissance tool designed for security professionals, penetration testers, and bug bounty hunters who need to identify all active and inactive subdomains within a target domain. This API leverages multiple enumeration techniques to build a comprehensive map of an organization's subdomain infrastructure, which is critical for attack surface mapping and vulnerability assessment.

Subdomain enumeration is often the first step in a security assessment workflow. By discovering hidden or forgotten subdomains, security teams can identify overlooked assets that may contain vulnerabilities, outdated services, or misconfigurations. The Subdomain Enumerator automates this reconnaissance process, saving time and improving coverage compared to manual discovery methods.

This tool is ideal for security researchers conducting authorized penetration tests, red team operators performing scope definition, DevSecOps teams mapping their infrastructure, and organizations performing internal asset discovery for compliance purposes.

Usage#

Sample Request#

json

{
  "domain": "example.com"
}

Sample Response#

json

{
  "domain": "example.com",
  "subdomains": [
    {
      "subdomain": "www.example.com",
      "ip_address": "93.184.216.34",
      "status": "active"
    },
    {
      "subdomain": "mail.example.com",
      "ip_address": "93.184.216.35",
      "status": "active"
    },
    {
      "subdomain": "staging.example.com",
      "ip_address": "192.0.2.1",
      "status": "active"
    },
    {
      "subdomain": "old-api.example.com",
      "ip_address": null,
      "status": "inactive"
    }
  ],
  "total_found": 4,
  "enumeration_time_ms": 5420
}

Endpoints#

POST /enumerate-deep#

Performs deep enumeration of subdomains for a specified domain using multiple reconnaissance techniques.

Method: POST

Path: /enumerate-deep

Request Parameters:

NameTypeRequiredDescriptiondomainstringYesThe target domain to enumerate (e.g., example.com). Must be a valid domain name.

Response Schema:

The response returns a JSON object containing:

FieldTypeDescriptiondomainstringThe target domain that was enumeratedsubdomainsarrayArray of discovered subdomain objects, each containing subdomain, ip_address, and status fieldstotal_foundintegerTotal count of subdomains discoveredenumeration_time_msintegerTime taken to complete enumeration in milliseconds

HTTP Status Codes:

• 200 OK — Enumeration completed successfully
• 422 Unprocessable Entity — Validation error in request body (missing or invalid domain parameter)

Pricing#

PlanCalls/DayCalls/MonthPriceFree550FreeDeveloper20500$39/moProfessional2005,000$99/moEnterprise100,0001,000,000$299/mo

About#

ToolWeb.in — 200+ security APIs, CISSP & CISM, platforms: Pay-per-run, API Gateway, MCP Server, OpenClaw, RapidAPI, YouTube.

• 🌐 toolweb.in
• 🔌 portal.toolweb.in
• 🤖 hub.toolweb.in
• 🐾 toolweb.in/openclaw/
• 🚀 rapidapi.com/user/mkrishna477
• 📺 youtube.com/@toolweb-009

References#

• Kong Route: https://api.mkkpro.com/security/subdomain-enumerator
• API Docs: https://api.mkkpro.com:8006/docs