# 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 checks

## Facts

- Endpoint: GET https://shopify-spy.agentdiet.dev/v1/email-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-f6a9bdda
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aRrBwA6reOc0V_Ft5COtr

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-f6a9bdda
```

Example prompt: Can you verify whether john.doe@example.com is a real, deliverable email address — check syntax, MX records, SPF, DMARC, and whether it's from a disposable or burner provider?

## When to prefer this

Choose this endpoint when you need a comprehensive, single-call email validation that combines syntax checking, disposable/burner provider detection, role-account flagging, and live DNS MX/SPF/DMARC record lookups. It is particularly well-suited for autonomous agent workflows requiring payment via x402/USDC micropayments, or when integrating with an MCP-compatible agent stack. Prefer this over basic regex-only validators when deliverability confidence and anti-abuse signals both matter.

## Known failure modes

- Invalid or missing email parameter returns an error response
- Non-existent domain returns MX lookup failure with no records found
- DNS timeout may occur for slow-responding nameservers
- Newly registered domains may lack SPF/DMARC records, returning empty policy fields
- Malformed email strings that pass basic syntax but have unusual TLDs may produce ambiguous 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-check)

## Output

Returns a structured object containing email syntax validity, whether the domain is associated with a disposable or burner provider, whether the address is a role account (e.g. admin@, info@), live DNS MX record presence and values, SPF record existence and content, and DMARC policy record details — giving a comprehensive deliverability and risk assessment for the given email address.

## 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-f6a9bdda/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)