# DNS SRV Scanner Record Lookup

> DNS SRV Scanner Record Lookup is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-23).

Looks up SRV records at _scanner._tcp.{hostname} for a given registrable domain

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/dns-srv-scanner?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-srv-scanner-record-lookup-da39a769
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qJbPzGwZzArlrLvjpxxo0

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 dns-srv-scanner-record-lookup-da39a769 -d '<json body>'
```

Example prompt: Look up the DNS SRV records for the scanner service on example.com — I need to know what hosts and ports are advertised at _scanner._tcp.example.com.

## When to prefer this

Use this endpoint when you specifically need SRV records under the _scanner._tcp service label for a given domain. It is purpose-built for scanner service discovery via DNS SRV and handles the underscore-prefix naming convention automatically, so callers supply only the plain registrable domain. Prefer the free unpaid POST /v1/sandbox/dns-srv-scanner first if available.

## Known failure modes

- Domain does not exist — DNS NXDOMAIN response
- No SRV record configured at _scanner._tcp.{hostname} — empty result
- Malformed hostname input rejected by schema validation
- DNS resolution timeout for slow or unreachable nameservers
- Payment not received — x402 payment required error

## How this service works

Call when an agent needs SRV records at _scanner._tcp.{hostname} for scanner. The caller sends the registrable domain, not the underscored name. Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/dns-srv-scanner first.

## Output

Returns the SRV record data found at _scanner._tcp.{hostname}, including priority, weight, port, and target hostname for each record entry, or an empty/error response if no such record exists.

## 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/dns-srv-scanner-record-lookup-da39a769/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)