# AgentShelf DKIM S2 Selector DNS TXT Lookup

> AgentShelf DKIM S2 Selector DNS TXT Lookup is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-01).

Retrieves the DKIM TXT record for the s2 selector at the given hostname (i.e., s2._domainkey.{hostname})

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/dns-txt-dkim-s2?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-dkim-s2-selector-dns-txt-lookup-0f11e476
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KintWL2M4Hecu34o7Dvyq

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-dkim-s2-selector-dns-txt-lookup-0f11e476 -d '<json body>'
```

Example prompt: Can you look up the DKIM TXT record for the s2 selector on the domain example.com?

## When to prefer this

Use this endpoint specifically when you need to retrieve the DKIM TXT record for the 's2' selector. If you need a different selector (e.g., s1, google, default), this endpoint will not be correct — each selector is a distinct DNS name. Prefer the free sandbox variant (/v1/sandbox/dns-txt-dkim-s2) for testing before paying.

## Known failure modes

- Hostname does not exist in DNS — NXDOMAIN or empty response
- No TXT record at s2._domainkey.{hostname} — DKIM selector not configured
- Invalid or malformed hostname input
- DNS resolution timeout or transient network error
- Payment failure via x402 protocol

## How this service works

Call when an agent needs TXT at s2._domainkey.{hostname}. A different selector is a different DNS name. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/dns-txt-dkim-s2 first.

## Output

Returns the DNS TXT record value published at s2._domainkey.{hostname}, typically containing the DKIM public key and policy fields (v=DKIM1; k=rsa; p=...).

## 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-dkim-s2-selector-dns-txt-lookup-0f11e476/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)