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Subdomain Finder MCP

MCP server · hosted · v1.0.0 · io.github.theluckystrike/subdomain-finder-mcp
Online · tested 6h agoNEW · 7h agoSeen in the registry 4h ago

Passive subdomain enumeration from certificate transparency (certspotter, crt.sh) with DNS checks.

Website ↗Source code ↗How to connect ↓

What it does

Subdomain Finder MCP is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.

No capability identified yet from its description.

Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.

At a glance

Hosted (remote)YES
Local installNO
Version1.0.0
PriceNot in the registry
First seen02 Nov 2026
Last checked4h ago

How to connect

As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 6h ago (live check)

Hosted endpoint

  • https://subdomain-finder-mcp.lipmichal.workers.dev/mcp streamable-http

In Claude Code: claude mcp add --transport http subdomain-finder-mcp https://subdomain-finder-mcp.lipmichal.workers.dev/mcp

MCP settings (Claude Desktop, Cursor and other MCP clients)

{
  "mcpServers": {
    "subdomain-finder-mcp": {
      "url": "https://subdomain-finder-mcp.lipmichal.workers.dev/mcp"
    }
  }
}

Live check

Electra Index connected to the hosted endpoint 6h ago

ONLINE Subdomain Finder MCP answered an MCP connection on 02 Nov 2026 and introduced itself as subdomain-finder-mcp 1.0.0 (MCP protocol 2025-06-18).

4 tools offered to AI assistants

  • find_subdomains · Passive subdomain enumeration for a domain from live certificate transparency logs: certspotter (unexpired certificates) with crt.sh as fallback or for expired history. Returns deduplicated hostnames with first seen and last seen issuance d
  • resolve_subdomains · Resolve up to 40 hostnames now through Cloudflare DNS over HTTPS (A, AAAA and the CNAME chain). Each host is marked live, nxdomain, no_records or dangling_cname (a CNAME whose target does not exist, a subdomain takeover lead), and CNAME tar
  • get_certificate_history · Certificates logged in certificate transparency for one hostname (or a whole domain with include_subdomains): issuer organisation and DN, not_before and not_after dates, every SAN on the certificate, revocation status and SHA-256 where cert
  • summarize_attack_surface · Reads a domain's subdomains from live certificate transparency and groups them for recon triage: development and test, staging, admin and internal tools, APIs, authentication, mail, remote access (VPN), storage and CDN, legacy and backup. E

What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method

Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.

Facts & evidence

Each fact shows where it was seen and when.
FactValueEvidenceSourceLast confirmed
Hosted endpointhttps://subdomain-finder-mcp.lipmichal.workers.dev/mcpDECLAREDSRC-001 Official MCP Registry4h ago
Local install (package)noDECLAREDSRC-001 Official MCP Registry4h ago
Remote access (hosted)yesDECLAREDSRC-001 Official MCP Registry4h ago
Websitehttps://bugbountyreality.com/tools/subdomain-finder-real/DECLAREDSRC-001 Official MCP Registry4h ago
Repositoryhttps://github.com/theluckystrike/subdomain-finder-mcpDECLAREDSRC-001 Official MCP Registry4h ago
Registry statusactiveDECLAREDSRC-001 Official MCP Registry4h ago
Version1.0.0DECLAREDSRC-001 Official MCP Registry4h ago
MCP serveryesDECLAREDSRC-001 Official MCP Registry4h ago

Change history

  • NEW02 Nov 2026
    first seen in the index

Is this page accurate?

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For publishers · optional

Its hosted endpoint can be monitored. Monitoring Pro connects every 30 minutes like an AI assistant, emails you within the hour when it stops answering, keeps a 90-day availability history and adds your answer rate to your badge.

Monitor Subdomain Finder MCPLaunch offer $39.99 once, for life instead of $9.99/month · All plans

Monitoring never changes a score or a rank.

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Questions about Subdomain Finder MCP

How do I connect Subdomain Finder MCP?

Use the hosted endpoint https://subdomain-finder-mcp.lipmichal.workers.dev/mcp in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.

What tools does Subdomain Finder MCP offer?

When Electra Index connected on 02 Nov 2026, it listed 4 tools: find_subdomains, resolve_subdomains, get_certificate_history, summarize_attack_surface. The full list is in "Live check" above.

Is Subdomain Finder MCP online?

Yes. Its hosted endpoint answered an MCP connection from Electra Index 6h ago.