# Email Deliverability Check

> Email Deliverability Check is a paid API for AI agents from email-check.hsharmanov02.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-28).

Checks email deliverability signals for a given domain, returning indicators like SPF, DKIM, DMARC, and MX record status

## Facts

- Endpoint: GET https://email-check.hsharmanov02.workers.dev/email?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/email-deliverability-check-8486d66d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__0huTFBIDmbPADnMN5mTA

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 email-deliverability-check-8486d66d
```

Example prompt: Can you check the email deliverability setup for mailchimp.com — I want to know if their SPF, DKIM, and DMARC records are properly configured?

## When to prefer this

Choose this endpoint when you need a quick, per-domain email deliverability health check without setting up API keys. It is ideal for one-off lookups, automated pre-send audits, or enriching a list of sender domains with authentication signal data. It works across multiple blockchains for micro-payment via x402, making it suitable for lightweight agent workflows that need deliverability checks on demand.

## Known failure modes

- Invalid or malformed domain name returns an error
- Domain does not exist or has no DNS records — may return empty or null signals
- Payment failure via x402 results in 402 response and no data returned
- Network or DNS timeout may cause delayed or failed lookup
- Private or internal domains may not resolve publicly

## How this service works

Email deliverability signals for any domain. Paid per call: $0.002 USDC on Base, Monad, Arbitrum, Optimism, Polygon, Avalanche or Solana (eip155:8453) via x402 v2. No API key.

## Output

Returns a JSON object containing email deliverability signals for the queried domain, typically including presence and validity of SPF, DKIM, DMARC, and MX DNS records, along with any warnings or flags indicating configuration issues that could affect email deliverability.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "domain"
 ],
 "properties": {
  "domain": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/email-deliverability-check-8486d66d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from email-check.hsharmanov02.workers.dev](https://www.zero.xyz/host/email-check.hsharmanov02.workers.dev/llms.txt)