# reverse-dns-lookup-bulk

> reverse-dns-lookup-bulk is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).

Performs reverse DNS lookups on up to 20 IP addresses in a single concurrent batch call, returning hostnames in input order with per-item error fields.

## Facts

- Endpoint: GET https://intel.rallylive.ca/bulk/dns/reverse
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/reverse-dns-lookup-bulk-b5a7e7d2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HDWyDwXTttOZeABjTZvUt

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 reverse-dns-lookup-bulk-b5a7e7d2
```

Example prompt: I have a list of 15 IP addresses from our server logs — can you do a bulk reverse DNS lookup on all of them and tell me their hostnames, flagging any that fail?

## When to prefer this

Use this endpoint when you need to resolve hostnames for multiple IP addresses (up to 20) in a single call rather than making repeated single-IP lookups. Ideal for log enrichment pipelines, security analysis, network audits, or any workflow where you hold a list of IPs and need their PTR records concurrently. Prefer over the single /dns/reverse endpoint whenever you have 2 or more IPs to resolve in the same operation.

## Known failure modes

- Individual IPs with no PTR record return a per-item error with null hostname
- Invalid IP address format causes a per-item error for that entry
- Batch exceeds 20 IPs may result in a request-level error
- Network timeout on upstream DNS resolvers may cause partial failures with non-zero failure count
- Payment failure (x402) blocks the entire batch call

## How this service works

Bulk reverse dns lookup: up to 20 ips in one call, processed concurrently, results returned in input order with a per-item error field and a count of failures. Same answer per item as the single /dns/reverse endpoint (Reverse DNS). Batch enrichment for agents that hold a list. $0.01 per batch.

## Output

An ordered array of reverse DNS results matching the input IP list. Each item contains the resolved hostname (PTR record) for the corresponding IP, a per-item error field if resolution failed, and an overall count of failures across the batch. Results are returned in the same order as the input IPs.

## 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/reverse-dns-lookup-bulk-b5a7e7d2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from intel.rallylive.ca](https://www.zero.xyz/host/intel.rallylive.ca/llms.txt)