# DNS SRV Record Lookup for Printer Services (_printer._tcp)

> DNS SRV Record Lookup for Printer Services (_printer._tcp) is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-23).

Resolves SRV records at _printer._tcp.{hostname} for a given registrable domain and returns the discovered printer service records.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/dns-srv-printer?utm_source=zero.xyz
- Price: $0.003/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-record-lookup-for-printer-services-printer-tcp-69c6669c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QyJA0QmTCO_5qzcyEcFkt

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-record-lookup-for-printer-services-printer-tcp-69c6669c -d '<json body>'
```

Example prompt: Can you look up the _printer._tcp SRV records for example.com so I can see what printer services are advertised in DNS?

## When to prefer this

Use this endpoint when an agent needs to programmatically discover printer services advertised via DNS SRV (RFC 2782) for a given domain, specifically the _printer._tcp service type. Prefer the free sandbox endpoint (/v1/sandbox/dns-srv-printer) for testing. Choose this over generic DNS lookup tools when you specifically need structured SRV record data for printer service discovery.

## Known failure modes

- Domain does not exist — DNS NXDOMAIN response, no records returned
- No _printer._tcp SRV records exist for the domain — empty result set
- Invalid hostname format (exceeds 253 characters or malformed) — input validation error
- DNS lookup timeout — transient network error
- Payment failure — x402 payment not accepted, request blocked

## How this service works

Call when an agent needs SRV records at _printer._tcp.{hostname} for printer. The caller sends the registrable domain, not the underscored name. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/dns-srv-printer first.

## Output

Returns the SRV record set found at _printer._tcp.{hostname}, typically including priority, weight, port, and target hostname for each advertised printer service endpoint. May return an empty set if no such records exist.

## 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-record-lookup-for-printer-services-printer-tcp-69c6669c/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)