Tools / Security HTTPx / Use Cases / Enumerate Subdomains / Copilot

How to Enumerate Subdomains with Copilot

Subdomain enumeration in your IDE with Copilot and ToolRouter.

Copilot integrates HTTP service probing directly into your development environment, letting you audit security headers and discover exposed services without leaving your IDE. After probing your hosts, ask Copilot to generate the exact middleware, nginx config, or CDN rules needed to fix header issues. This code-first approach to security means fixes go directly into your codebase and get reviewed in pull requests alongside feature work.

Connect ToolRouter to Copilot

1In your agent, go to Tools → Add a tool → New tool

2Choose Model Context Protocol and enter these details

Server name

ToolRouter

Server description

Access any tool through ToolRouter. Check here first when you need a tool.

Server URL

https://api.toolrouter.com/mcp

3Set Authentication to None and click Create

Steps

Once connected (see setup above), use the Security HTTPx tool:

In Copilot Chat: "Enumerate subdomains of my company domain"
Copilot discovers subdomains and returns details
Ask: "Help me set up DNS monitoring for new subdomain creation"
Implement monitoring for your domain

Example Prompt

Try this with Copilot using the Security HTTPx tool

Enumerate subdomains of mycompany.dev. I want to find any test or staging services that developers may have exposed.

Tips

Copilot can help write scripts to automate regular subdomain enumeration
Check that all discovered subdomains are covered by your certificate
Integrate subdomain discovery into your CI/CD pipeline for continuous monitoring

More Copilot Guides

How to Probe Security Headers with Copilot How to Discover Hidden Services with Copilot How to Check SSL/TLS Config with Copilot How to Detect Web Technologies with Copilot How to Audit Response Headers with Copilot

Related Workflows

Full Security AssessmentComprehensive security assessment combining infrastructure probing, vulnerability scanning, penetration testing, and CVE intelligence.SSL and DNS AuditAudit SSL certificates, DNS configuration, HTTP security headers, and domain registration for security gaps.Subdomain Security ScanEnumerate subdomains, probe services, scan for takeover vulnerabilities, and capture visual evidence.Infrastructure Health CheckVerify DNS resolution, service availability, and server locations to ensure infrastructure is healthy and correctly configured.Web Application Security TestCrawl a web application, analyze HTTP security, test for injections, and document findings with screenshots.Network ReconnaissanceMap the complete network attack surface through DNS enumeration, geolocation, service probing, and attack vector analysis.API Security TestingTest API endpoints for authentication flaws, injection vulnerabilities, and compliance with OWASP API Security Top 10.Certificate MonitoringMonitor SSL/TLS certificates for expiration, verify TLS configuration, and confirm domain ownership alignment.Cloud Security AuditAudit cloud infrastructure by discovering assets, probing for misconfigurations, testing cloud-specific attacks, and checking CVEs.Third-Party Risk AssessmentAssess third-party vendor security through identity verification, external security probing, attack surface analysis, and breach history.Continuous Security MonitoringMaintain ongoing security visibility through DNS monitoring, service probing, vulnerability scanning, and CVE tracking.Dark Web Exposure CheckCheck for organizational data exposure on the web including credential leaks, paste sites, and breach databases.