# agentshelf.syntexa.ch DNS SRV HKPS Lookup

> agentshelf.syntexa.ch DNS SRV HKPS Lookup is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.009/call, status unknown (last checked 2026-10-02).

Looks up SRV records at _hkps._tcp.{hostname} for HKPS (HTTP Keyserver Protocol Secure) key server discovery

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/dns-srv-hkps?utm_source=zero.xyz
- Price: $0.009/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-srv-hkps-lookup-c5861f15
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FmcjLMVyc_A9jtcy5R9vt

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-srv-hkps-lookup-c5861f15 -d '<json body>'
```

Example prompt: Look up the HKPS SRV record for example.com so I can find the secure keyserver endpoint for that domain.

## When to prefer this

Use this endpoint when an agent needs to discover the HKPS (HTTP Keyserver Protocol Secure) endpoint for a domain via DNS SRV records, specifically when building OpenPGP key infrastructure, email encryption workflows, or any system that needs to locate a WKD or HKP-compatible secure keyserver. Prefer the free sandbox POST /v1/sandbox/dns-srv-hkps first; use this paid endpoint when production reliability is required or the sandbox is unavailable.

## Known failure modes

- No SRV record exists for the given domain — returns empty result
- Invalid or malformed hostname — validation error
- DNS resolution timeout — service unavailable error
- Domain does not support HKPS — no matching record found
- Payment not accepted — x402 payment required error

## How this service works

Call when an agent needs SRV records at _hkps._tcp.{hostname} for HKPS. The caller sends the registrable domain, not the underscored name. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/dns-srv-hkps first.

## Output

Returns DNS SRV record fields for _hkps._tcp.{hostname}, typically including priority, weight, port, and target hostname of the HKPS keyserver. Returns an empty or error response if no SRV record exists for the domain.

## 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-srv-hkps-lookup-c5861f15/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)