# 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 health.

## Facts

- Endpoint: GET https://shopify-spy.agentdiet.dev/v1/spf-dmarc-auditor?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-4d3b57a6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1A1QqqoCGs6fmlFLkqEzU

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-4d3b57a6
```

Example prompt: Can you check whether support@acmecorp.com is actually deliverable — I want to know if the syntax is valid, if it's a disposable or role account, and whether the domain has proper MX, SPF, and DMARC records set up?

## When to prefer this

Choose this endpoint when you need a single-call, comprehensive email health check covering syntax, disposable provider detection, role account flagging, and live DNS MX/SPF/DMARC validation — especially useful in B2B lead enrichment, user onboarding flows, or pre-send deliverability audits where bounce risk and domain reputation matter. Prefer it over simple syntax-only validators when DNS record verification and spam signal detection are required.

## Known failure modes

- Missing or malformed email parameter returns a validation error
- DNS lookup timeout if the domain's nameservers are unresponsive
- Non-existent domain returns no MX/SPF/DMARC records found
- Ambiguous results for newly registered domains with incomplete DNS propagation
- Rate limiting or payment failure if the x402 micropayment is not completed

## 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/spf-dmarc-auditor)

## Output

Returns a structured object indicating email syntax validity, whether the domain belongs to a known disposable/burner provider, whether it is a role-based account (e.g. admin@, info@), and live DNS lookup results including MX records, SPF record presence/content, and DMARC policy record, enabling a complete 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-4d3b57a6/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)