# Kerberos UDP SRV Record Lookup

> Kerberos UDP SRV Record Lookup is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).

Resolves _kerberos._udp SRV DNS records for a domain via Cloudflare DoH, returning priority, weight, port, and target host for the Kerberos authentication service.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/srv/kerberos-udp?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kerberos-udp-srv-record-lookup-afca0c6d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WNWRRVaNeSBVtQFtFbwuZ

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 kerberos-udp-srv-record-lookup-afca0c6d
```

Example prompt: Where is the Kerberos UDP service for example.com? Look up its SRV DNS record and tell me the target host, port, priority, and weight.

## When to prefer this

Choose this endpoint when you need to programmatically discover a domain's Kerberos KDC service location via standard DNS SRV discovery without hardcoding hostnames — ideal for automated Kerberos client configuration, network auditing, or validating enterprise identity infrastructure. Prefer this over manual DNS queries when operating in an agentic pipeline that requires structured SRV output via a paid API with Cloudflare DoH reliability.

## Known failure modes

- Domain has no _kerberos._udp SRV record — returns empty answer section
- Domain does not exist (NXDOMAIN) — returns DNS error
- Cloudflare DoH is unreachable — returns upstream timeout or connectivity error
- Malformed domain input — returns validation or bad request error
- Payment not included or insufficient — returns 402 Payment Required

## How this service works

KERBEROS service discovery (_kerberos._udp.<domain>): SRV records with priority, weight, port and target host, from Cloudflare DoH. Tells a client where the domain's kerberos service lives without guessing hosts. $0.01 per lookup.

## Output

Returns the SRV record details for _kerberos._udp.<domain>, including one or more records each containing: priority (integer), weight (integer), port (integer), and target hostname — exactly the information a Kerberos client needs to locate the Key Distribution Center (KDC) without guessing hostnames.

## 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/kerberos-udp-srv-record-lookup-afca0c6d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dns.intel.rallylive.ca](https://www.zero.xyz/host/dns.intel.rallylive.ca/llms.txt)