# 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 2026-10-21).

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

## Facts

- Endpoint: GET https://shopify-spy.agentdiet.dev/v1/mx-check?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-b7f4bd6e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7icyyYskOuJ57HDUUAX6E

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-b7f4bd6e
```

Example prompt: Can you check whether john.doe@acmecorp.com is a real, deliverable email address — specifically whether its domain has valid MX records, isn't a disposable or burner provider, and has SPF and DMARC configured?

## When to prefer this

Choose this endpoint when you need a comprehensive, single-call email validation that combines syntax checking, disposable/burner detection, role account flagging, and live DNS MX/SPF/DMARC verification. It is especially useful for B2B lead qualification, signup form validation, and outreach list hygiene where you need more than just a regex check. Prefer it over generic SMTP-ping tools when email authentication record auditing (SPF/DMARC) is also required.

## Known failure modes

- Invalid or malformed email string returns a syntax error or validation failure
- Domain with no MX records returns undeliverable status
- DNS lookup timeout for slow or unreachable nameservers
- Disposable provider database may not cover every new burner service
- Role account detection may produce false positives for uncommon prefixes

## 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/mx-check)

## Output

Returns a structured object indicating whether the email address is syntactically valid, whether it belongs to a known disposable or burner email provider, whether it is a role account (e.g. info@, admin@), and the live DNS status of the domain's MX, SPF, and DMARC records — providing a comprehensive deliverability and trust 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-b7f4bd6e/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)