# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from shopify-spy.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-28).

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

## Facts

- Endpoint: POST https://shopify-spy.agentdiet.dev/v1/email-validator?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Provider: shopify-spy.agentdiet.dev
- Website: https://shopify-spy.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/shopify-spy-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-3594cc50
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZPWHizjt9_c8HXN0cAErX

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 shopify-spy-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-3594cc50 -d '<json body>'
```

Example prompt: Can you check whether john.doe@acmecorp.com is a real, deliverable email — specifically whether the domain has valid MX records, passes SPF and DMARC checks, and isn't a disposable or role-based address?

## When to prefer this

Choose this endpoint when you need a comprehensive, live email validation that goes beyond simple regex checks — specifically when you need real-time DNS MX record lookups combined with SPF/DMARC policy checks and disposable-provider detection in a single call. Ideal for lead enrichment pipelines, signup fraud prevention, and pre-send campaign validation where deliverability accuracy matters.

## Known failure modes

- Invalid or malformed email input returns a syntax error response
- DNS lookup timeouts may cause MX/SPF/DMARC fields to be null or unavailable
- Domain does not exist, resulting in no MX records found
- Rate limits or payment failures return HTTP 402 requiring USDC payment via x402
- Transient DNS resolver errors may produce incomplete results

## 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://shopify-spy.agentdiet.dev/v1/email-validator)

## Output

Returns a structured object indicating whether the email passes syntax validation, whether the domain is from a known disposable/burner provider, whether it appears to be a role account (e.g. info@, support@), and the live DNS lookup results for MX, SPF, and DMARC records — giving an overall deliverability 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/shopify-spy-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-3594cc50/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from shopify-spy.agentdiet.dev](https://www.zero.xyz/host/shopify-spy.agentdiet.dev/llms.txt)