Hyrule Cloud NAT Port Forward Check

x402

Hyrule Cloud NAT Port Forward Check is a paid API for AI agents from cloud.hyrule.host, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-27).

Checks whether a specific TCP or UDP port on a target host is reachable and forwarded through NAT/CGNAT from an external vantage point

Price / call$0.005

Seller volume →—

Success—

StatusUnknown

How this service works

Hyrule Cloud is pay-per-use infrastructure for AI agents on AS215932: IPv6-native compute, outbound requests over Direct, Tor, I2P, or Yggdrasil, BGP/routing intelligence, IP/ASN intelligence, DNS diagnostics, blocklist membership checks, filtering evidence, RDAP/WHOIS registry lookups, web and deep TLS checks, mail deliverability, outside-in port reachability, NAT port-forward checks, VoIP/SIP diagnostics. Calls settle in USDC via x402. Domain registration is deferred from this launch catalog. This OpenAPI document contains the launch-ready, independently payable agent surface plus the free supporting routes (quotes, status polling, pricing, template catalog) required to complete those workflows.

Output

Returns a diagnostic response with a status (ok/info/warning/critical/error), a human-readable summary, a list of findings with severity codes and messages, the resolved target info, optional raw probe data including service banner, and a request ID with timestamp.

Example use cases

Verifying home server SSH access

“Can you check if port 22 is open and reachable on myserver.example.com from outside? I want the SSH banner too so I can confirm it's the right service.”

Diagnosing game server port block

“Test whether UDP port 25565 on gameserver.example.com is accessible from an external vantage — I'm trying to figure out if my ISP's CGNAT is blocking it.”

Confirming HTTPS service reachability

“Verify that port 443 is forwarded and reachable on api.myapp.dev using the https profile — I need to know if my reverse proxy is accepting connections from the outside world.”

Technical details

Endpoint

POSThttps://cloud.hyrule.host/v1/nat/port-forward/check?utm_source=zero.xyz

When to prefer

Use this endpoint when you need external verification that a port is forwarded and reachable through NAT or CGNAT from a real internet vantage point, especially when testing home servers, self-hosted services, or VMs behind carrier-grade NAT. Prefer this over generic port scanners when you need structured diagnostic findings, banner grabbing, protocol-profile-aware probing, or when operating in an agent context requiring x402 per-request payment on Base.

Side effects

Target host unreachable — port closed or filtered, returned as 'critical' or 'warning' status
Invalid port number outside 1–65535 range — schema validation error
Timeout exceeded (up to 30000ms) — returned as 'error' or 'warning' status
Invalid target format or hostname resolution failure — error status
Vantage point temporarily unavailable — error status with explanation

Input

Schema · Request body

Field	Type	Description
port	integer
target	string
profile	string
vantage	string
protocol	string
timeout_ms	integer
include_banner	boolean

Output

Schema · Response

{
  "type": "json",
  "example": {
    "status": "ok",
    "target": {
      "type": "host",
      "input": "example.com:443",
      "normalized": "example.com:443"
    },
    "partial": false,
    "sources": {},
    "summary": "Port forward is reachable",
    "findings": [
      {
        "code": "example",
        "message": "No issue found",
        "severity": "ok"
      }
    ],
    "request_id": "diag_a1b2c3d4",
    "generated_at": "2026-07-15T00:00:00Z"
  }
}

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