# AgentShelf DKIM TXT Record Lookup (key1 selector)

> AgentShelf DKIM TXT Record Lookup (key1 selector) 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).

Retrieves the DKIM TXT DNS record at key1._domainkey.{hostname} for a given domain

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/dns-txt-dkim-key1?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-dkim-txt-record-lookup-key1-selector-c4aa7139
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_N_Txj4s9dxNy4w6B-axzZ

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-txt-record-lookup-key1-selector-c4aa7139 -d '<json body>'
```

Example prompt: Can you look up the DKIM TXT record for the key1 selector on example.com — I need to see what public key they have published at key1._domainkey.example.com?

## When to prefer this

Use this endpoint when you specifically need the key1 DKIM selector TXT record for a domain. For other DKIM selectors, use the equivalent endpoint with the appropriate selector name. Try the free sandbox endpoint POST /v1/sandbox/dns-txt-dkim-key1 first before paying $0.001 USDC for this production endpoint.

## Known failure modes

- Domain does not have a key1._domainkey TXT record (NXDOMAIN or empty response)
- Invalid or malformed hostname input
- Hostname exceeds 253 character limit
- DNS resolution timeout or upstream failure
- Private or reserved hostname rejected

## How this service works

Call when an agent needs TXT at key1._domainkey.{hostname}. A different selector is a different DNS name. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/dns-txt-dkim-key1 first.

## Output

Returns the raw TXT record value published at key1._domainkey.{hostname} in DNS, typically a DKIM public key string in the format '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-txt-record-lookup-key1-selector-c4aa7139/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)