# is-port-513-open-bulk

> is-port-513-open-bulk is a paid API for AI agents from ip.intel.rallylive.ca, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-11).

Checks whether TCP port 513 (rlogin/rwho) is open on up to 20 hosts concurrently in a single batch call, returning ordered results with per-item error fields and a failure count.

## Facts

- Endpoint: GET https://ip.intel.rallylive.ca/bulk/ip/port/513?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/is-port-513-open-bulk-e4f8afb1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mlITZk0ICeh4YxILtvqxE

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-513-open-bulk-e4f8afb1
```

Example prompt: Check whether TCP port 513 is open on these 10 servers all at once: 192.168.1.1, 192.168.1.2, 10.0.0.1, 10.0.0.5, 203.0.113.1, 203.0.113.2, 198.51.100.1, 198.51.100.2, 172.16.0.1, and 172.16.0.2 — give me the results in order with any errors flagged.

## When to prefer this

Choose this endpoint when you need to check port 513 status across multiple hosts simultaneously and want to avoid making N sequential single-host calls. It processes up to 20 hosts concurrently, returns results in input order, and includes per-item error handling — ideal for batch enrichment pipelines, security audits, or infrastructure scans where you already hold a list of targets.

## Known failure modes

- Batch exceeds 20 hosts — request rejected or truncated
- Individual host unreachable — per-item error field populated, counted in failure total
- Invalid hostname or IP format in input — per-item error returned
- Network timeout from Cloudflare edge to target host — item marked as error
- Payment not fulfilled (x402) — request blocked before processing

## How this service works

Bulk is port 513 open: up to 20 hosts in one call, processed concurrently, results in input order with a per-item error field and a failure count. Same answer per item as the single endpoint. Batch enrichment for agents that hold a list. $0.10 per batch.

## Output

An ordered array of per-host results matching the input list, each containing whether port 513 is open or closed, a per-item error field if the check failed, and a summary failure count across the batch.

## 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-513-open-bulk-e4f8afb1/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)