# SparkPost DKIM DNS TXT Record Lookup

> SparkPost DKIM DNS TXT Record Lookup is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-01).

Retrieves the DKIM TXT record published at the sparkpost._domainkey subdomain of a given hostname

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/dns-txt-dkim-sparkpost?utm_source=zero.xyz
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sparkpost-dkim-dns-txt-record-lookup-086f7a7c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vyy346m2sJ6-NosBLbqpJ

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 sparkpost-dkim-dns-txt-record-lookup-086f7a7c -d '<json body>'
```

Example prompt: What's the DKIM TXT record published at sparkpost._domainkey.example.com — can you look up the DNS TXT entry for that SparkPost selector on that hostname?

## When to prefer this

Use this endpoint when you specifically need to query the SparkPost DKIM selector (sparkpost._domainkey) for a domain. Choose this over generic DNS lookup tools when the SparkPost selector is the target — it abstracts the selector name and DNS query mechanics. For other DKIM selectors or other DNS record types, use a general DNS lookup service instead.

## Known failure modes

- Hostname not found in DNS returns an NXDOMAIN or empty result
- Domain exists but no sparkpost._domainkey record published returns empty or null TXT
- Malformed hostname input may return a validation error
- Network or DNS resolver timeout may cause request failure

## How this service works

Call when an agent needs TXT at sparkpost._domainkey.{hostname}. A different selector is a different DNS name. Exact $0.006 USDC. Prefer unpaid POST /v1/sandbox/dns-txt-dkim-sparkpost first.

## Output

Returns the raw DNS TXT record string found at sparkpost._domainkey.{hostname}, which typically contains a DKIM public key entry (e.g. v=DKIM1; k=rsa; p=...) used by SparkPost to authenticate outgoing email for that 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/sparkpost-dkim-dns-txt-record-lookup-086f7a7c/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)