# agentshelf.syntexa.ch DNS SOA Lookup

> agentshelf.syntexa.ch DNS SOA Lookup is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

Retrieves SOA (Start of Authority) DNS record fields for a given hostname, including ns, hostmaster, serial, refresh, retry, expire, and minimum values.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/dns-soa?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-syntexa-ch-dns-soa-lookup-c6951e5a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nXLnhkEli_KbEe8VFKf9d

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 agentshelf-syntexa-ch-dns-soa-lookup-c6951e5a -d '<json body>'
```

Example prompt: Can you look up the SOA DNS record for syntexa.ch and tell me the nameserver, hostmaster, serial, refresh, retry, expire, and minimum values?

## When to prefer this

Use this endpoint when an agent needs to programmatically retrieve SOA DNS record fields for a domain, particularly for infrastructure checks, DNS propagation verification, or identifying the authoritative nameserver and zone administrator. Prefer the free sandbox endpoint (/v1/sandbox/dns-soa) first for testing; use this paid endpoint for production or when the sandbox is unavailable.

## Known failure modes

- Hostname does not exist or has no SOA record — returns an error or empty result
- Malformed hostname input (e.g. exceeds 253 characters) — schema validation error
- DNS timeout or upstream resolver failure — transient error
- Payment not provided or insufficient — 402 Payment Required response

## How this service works

Call when an agent needs SOA as ns, hostmaster, serial, refresh, retry, expire, minimum. Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/dns-soa first.

## Output

Returns the full SOA record for the queried hostname, including: primary nameserver (ns), hostmaster email address, zone serial number, refresh interval (seconds), retry interval (seconds), expire interval (seconds), and minimum TTL (seconds).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "hostname": {
   "type": "string",
   "examples": [
    "example.com"
   ],
   "maxLength": 253,
   "minLength": 1,
   "description": "Public DNS hostname such as example.com. Not a URL, not an IP literal, and not a private name."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentshelf-syntexa-ch-dns-soa-lookup-c6951e5a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)