# agentshelf.syntexa.ch DKIM Selector2 TXT Lookup

> agentshelf.syntexa.ch DKIM Selector2 TXT Lookup is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).

Looks up the DKIM public key TXT record at selector2._domainkey.{hostname} via DNS

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/dns-txt-dkim-selector2?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-syntexa-ch-dkim-selector2-txt-lookup-fe8b0a83
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Al_02gypw4ot7JEk1ctR-

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-dkim-selector2-txt-lookup-fe8b0a83 -d '<json body>'
```

Example prompt: Look up the DKIM selector2 TXT record for the domain example.com — I need to see what's published at selector2._domainkey.example.com.

## When to prefer this

Use this endpoint when you specifically need the selector2 DKIM TXT record for a given hostname. Prefer the free sandbox endpoint (POST /v1/sandbox/dns-txt-dkim-selector2) if available before paying. Use this paid endpoint when the sandbox is unavailable or rate-limited. If you need selector1 or a differently named selector, use the corresponding endpoint for that selector.

## Known failure modes

- No TXT record found at selector2._domainkey.{hostname} — domain may not have selector2 DKIM configured
- Invalid or malformed hostname input
- DNS resolution timeout or upstream DNS failure
- hostname exceeds 253 characters or is empty

## How this service works

Call when an agent needs TXT at selector2._domainkey.{hostname}. A different selector is a different DNS name. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/dns-txt-dkim-selector2 first.

## Output

Returns the raw TXT record string published at selector2._domainkey.{hostname} in DNS, typically containing a DKIM public key in the format v=DKIM1; k=rsa; p=<base64-public-key>.

## 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-dkim-selector2-txt-lookup-fe8b0a83/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)