# Stack Facts Port Lookup

> Stack Facts Port Lookup is a paid API for AI agents from g5joilnmeep4ntz3nwezxt5dmu.srv.us, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-19).

Looks up IANA service name and transport protocol information for a given port number

## Facts

- Endpoint: GET https://g5joilnmeep4ntz3nwezxt5dmu.srv.us/v1/port/%7Bnumber%7D?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stack-facts-port-lookup-8b0a1b55
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-PzgLcDiWf4IPRv4BOAhv

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability stack-facts-port-lookup-8b0a1b55
```

Example prompt: What is the official IANA service name and transport protocol for port 443?

## When to prefer this

Choose this endpoint when you need authoritative, IANA-sourced service name and protocol information for a specific port number, especially in security auditing, network configuration, or firewall rule validation workflows. It is signed and pay-per-call with no account setup required, making it ideal for agent-driven automation that needs trusted, on-demand port lookups without committing to a subscription.

## Known failure modes

- Port number not found in IANA registry — returns empty services list
- Invalid port number format — may return error or empty response
- Port above 65535 or non-integer input may be rejected
- Stale data flag set to true if dataset is outdated
- Payment failure via x402 protocol if USDC balance insufficient

## How this service works

Check a package before install: malware, known vulnerabilities (OSV), exploited CVEs (CISA KEV) and end-of-life, plus LLM prices; signed answers, pay per call in USDC, no account or API key.

## Output

Returns a JSON object containing the port number, a list of associated services (each with service name, transport protocol, description, and RFC reference), plus metadata including the dataset version date, staleness flag, IANA source URL, and retrieval timestamp.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "port": 443,
   "services": [
    {
     "reference": "[RFC 9260]",
     "transport": "sctp",
     "description": "HTTPS",
     "service_name": "https"
    }
   ]
  },
  "meta": {
   "date": "2026-09-30",
   "stale": false,
   "notice": "IANA Service Name and Transport…",
   "source": "https://www.iana.org/assignment…",
   "dataset": "port",
   "version": "2026-09-30",
   "attribution": "IANA Service Name and Transport…",
   "retrieved_at": "2026-10-14T20:53:46.534Z"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stack-facts-port-lookup-8b0a1b55/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from g5joilnmeep4ntz3nwezxt5dmu.srv.us](https://www.zero.xyz/host/g5joilnmeep4ntz3nwezxt5dmu.srv.us/llms.txt)