Hackertarget MCP server

@pipeworx/hackertarget

HackerTarget MCP — DNS and network-recon utilities. Eleven of the fourteen tools need no credential; three (whois, mtr, traceroute) require the caller's own HackerTarget key.

Part of Pipeworx — an MCP gateway connecting AI agents to 1679+ live data sources.

Responses are line-oriented plain text from upstream; this pack parses them into structured JSON when reasonable (lines[] plus the verbatim raw).

Tools

Keyless — call with just target:

• dns_lookup(target) — A/AAAA/MX/NS/SOA records for a hostname
• reverse_dns(target) — reverse DNS (PTR) for an IP
• nping(target) — ICMP ping from HackerTarget's probe host
• dnshostsearch(target) — passive DNS subdomain search
• findshareddns(target) — domains sharing the same nameserver
• geoip(target) — IP geolocation (country / region / city / coords)
• reverse_ip(target) — hostnames resolving to the same IP
• as_lookup(target) — ASN, announced prefix and network name
• http_headers(target) — HTTP response headers for a host or URL
• subnet_lookup(target) — subnet arithmetic for a CIDR block
• page_links(target) — links extracted from one page (full URL)

Require a caller-supplied key — call with target and _apiKey:

• whois(target, _apiKey) — WHOIS record for a domain or IP
• mtr(target, _apiKey) — per-hop loss/latency report
• traceroute(target, _apiKey) — routers between HackerTarget and the target

Auth

Pipeworx fronts no platform key for HackerTarget. The eleven keyless tools work with no credential at all; whois, mtr and traceroute are gated behind a HackerTarget membership and are bring-your-own-key (Bruce's ruling, fleet #2132, 2026-09-16).

Get a key from the HackerTarget member dashboard () and pass it as _apiKey. It is forwarded as the apikey= query parameter HackerTarget documents.

A keyless call to one of the three gated tools is refused before any request leaves the gateway, with error: authrequired and a message saying the tool requires an API key and where to get one. It is not an outage and does not count as a tool failure. A key that is supplied and then rejected by HackerTarget gets a different authrequired message — "the key you supplied was refused" — so a caller who already holds a key is not sent to fetch it again.

Passing _apiKey to the eleven keyless tools is allowed and useful: it bills the call against the caller's own member quota instead of the shared free tier.

Rate limits

HackerTarget's free tier is 50 calls/day per source IP at up to 2 requests/s (their FAQ, re-read 2026-09-16 — older copies of this file said 100). That source IP is the gateway's shared egress, so an exhausted quota surfaces as an API count exceeded body rather than an HTTP 429. Pipeworx's own rate limit is the outer envelope. Callers who bring _apiKey draw on their own quota.

Data sources

• https://api.hackertarget.com — every tool in this pack
• — endpoint, auth and quota documentation

Quick Start

Add to your MCP client (Claude Desktop, Cursor, Windsurf, etc.):

{
  "mcpServers": {
    "hackertarget": {
      "url": "https://gateway.pipeworx.io/hackertarget/mcp"
    }
  }
}

What this endpoint actually serves

tools/list at https://gateway.pipeworx.io/hackertarget/mcp returns the tools in the table above plus the shared Pipeworx meta-tools — askpipeworx, discovertools, search_within, remember/recall and the rest of the gateway-wide set. So the tool count you see is larger than this table: a single-pack endpoint currently lists roughly 30 shared tools alongside the pack's own. The connection's initialize response states its exact scope, and is the authoritative answer for a given day.

Shortened. The full README is on GitHub.