# x402broker Email Deliverability & DNS Verifier

> x402broker Email Deliverability & DNS Verifier is a paid API for AI agents from x402broker.com, paid per call via x402 or MPP, $0.005/call, status unknown (last checked 2026-10-20).

Validates an email address for syntax correctness, disposable/burner provider status, role account detection, and live DNS MX/SPF/DMARC record checks.

## Facts

- Endpoint: GET https://x402broker.com/v1/email-check?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402, MPP
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402broker-email-deliverability-dns-verifier-2c96d896
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0w_ddV3F36ySsg2I84tO5

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 x402broker-email-deliverability-dns-verifier-2c96d896
```

Example prompt: Can you check if john.doe@tempmail.org is a real, deliverable email address — specifically whether it's from a disposable provider, has valid MX records, and passes SPF and DMARC?

## When to prefer this

Choose this endpoint when you need a comprehensive, real-time email validation that goes beyond simple syntax checking — specifically when you need to combine disposable provider detection, role account flagging, and live DNS record verification (MX, SPF, DMARC) in a single call. Ideal for pre-signup screening, outbound sales qualification, and deliverability auditing. Prefer over basic regex validators or single-purpose MX checkers when you need all signals in one response.

## Known failure modes

- Invalid or malformed email address provided — returns syntax error
- DNS lookup timeout or unreachable nameservers — MX/SPF/DMARC fields may be null or flagged as unresolvable
- Domain does not exist — all DNS checks fail with NXDOMAIN
- Missing required email query parameter — returns 400 bad request
- Payment not included or insufficient — returns HTTP 402 payment required

## How this service works

Validates email syntax, disposable/burner provider status, role accounts, and live DNS MX/SPF/DMARC records. (Live x402 v2, IETF MPP & MCP endpoint at https://x402broker.com/v1/email-check)

## Output

Returns a structured report for the queried email address including: syntax validity, whether the domain uses a known disposable/burner email provider, whether it is a role account (e.g. admin@, info@), live DNS MX record lookup results, SPF record presence and validity, and DMARC policy record status — giving a comprehensive deliverability and legitimacy assessment.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "email"
 ],
 "properties": {
  "email": {
   "type": "string",
   "minLength": 1,
   "description": "Email address to validate for syntax, MX deliverability, and disposable risk"
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402broker-email-deliverability-dns-verifier-2c96d896/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402broker.com](https://www.zero.xyz/host/x402broker.com/llms.txt)