# is-port-548-open

> is-port-548-open is a paid API for AI agents from ip.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).

Checks whether TCP port 548 (Apple Filing Protocol / AFP) is open, closed, or filtered on a given host by attempting a connection from Cloudflare's edge network.

## Facts

- Endpoint: GET https://ip.intel.rallylive.ca/ip/port/548?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/is-port-548-open-84043f15
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ovlfVYjquTenr_As8wQaR

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 is-port-548-open-84043f15
```

Example prompt: Can you check if TCP port 548 (AFP) is open on the host 203.0.113.42 — I need to know if the Apple Filing Protocol service is exposed to the internet?

## When to prefer this

Use this endpoint when you need a quick, passive check of AFP (TCP port 548) exposure on a specific host without deploying a full port scanner. It is ideal for security audits, compliance checks, or pre-deployment validation where you want an external perspective from Cloudflare's edge network. Prefer it over generic port scanners when you specifically need AFP detection and want a lightweight, pay-per-use API call at $0.01 per check.

## Known failure modes

- Host is Cloudflare-fronted — result returned as inconclusive rather than true open/closed
- Host is unreachable or DNS does not resolve — likely returns filtered or error
- Firewall silently drops packets — port reported as filtered rather than closed
- Connection timeout if host is very slow to respond
- Invalid or private IP address provided — may return error or filtered status

## How this service works

Is TCP port 548 (AFP) open on a host? Attempts a connection from Cloudflare's edge and reports open/closed/filtered with the connect time; Cloudflare-fronted hosts are reported as inconclusive because their edge answers for them. Exposure checks for AFP without running a scanner. $0.01 per check.

## Output

Returns the port status (open, closed, or filtered) for TCP port 548 on the target host, including the TCP connect time in milliseconds. If the host is behind Cloudflare, the result is flagged as inconclusive because Cloudflare's edge may answer the connection on behalf of the origin server.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/is-port-548-open-84043f15/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ip.intel.rallylive.ca](https://www.zero.xyz/host/ip.intel.rallylive.ca/llms.txt)