# DKIM Selector1 TXT Record Lookup

> DKIM Selector1 TXT Record Lookup is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-01).

Fetches the DKIM TXT record at selector1._domainkey.{hostname} via DNS lookup

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/dns-txt-dkim-selector1?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dkim-selector1-txt-record-lookup-5a042b20
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_q5uzU2Z8mmX4fSLZpKUFe

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 dkim-selector1-txt-record-lookup-5a042b20 -d '<json body>'
```

Example prompt: Can you fetch the DKIM TXT record at selector1._domainkey for the domain example.com?

## When to prefer this

Use this endpoint when you specifically need to resolve the selector1 DKIM TXT record for a given domain, for purposes such as email authentication validation, deliverability auditing, or security investigation. It is purpose-built for the selector1._domainkey subdomain lookup; for other selectors (e.g. selector2, google, mail), a different DNS TXT endpoint would be needed.

## Known failure modes

- Hostname does not have a selector1 DKIM TXT record published — returns empty or not-found response
- Invalid or malformed hostname input causes validation error
- DNS resolution timeout or upstream failure
- Private/reserved hostnames may be rejected
- Hostname exceeds 253-character limit

## How this service works

Call when an agent needs TXT at selector1._domainkey.{hostname}. A different selector is a different DNS name. Exact $0.01 USDC. Prefer unpaid POST /v1/sandbox/dns-txt-dkim-selector1 first.

## Output

Returns the raw TXT record string found at selector1._domainkey.{hostname} in DNS, typically containing a DKIM public key entry (e.g. v=DKIM1; k=rsa; p=MIIBIjAN...). Returns an error or empty result if no 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/dkim-selector1-txt-record-lookup-5a042b20/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)