# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from shopify-intel.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/DMARC record resolution.

## Facts

- Endpoint: GET https://shopify-intel.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-intel.agentdiet.dev
- Website: https://shopify-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/shopify-intel-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-a6ddf204
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Q2zElBjP6VpyJs4nuhCRG

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-intel-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-a6ddf204
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email address — verify the syntax, confirm MX records exist, and flag it if it looks like a disposable or role account?

## When to prefer this

Choose this endpoint when you need a single-call, real-time check covering email syntax, live MX record lookup, and DNS-level deliverability signals (SPF/DMARC) along with disposable and role account detection — ideal for agent workflows doing lead enrichment, user signup validation, or pre-send list hygiene where you need more than a simple regex check but don't want to integrate separate DNS and reputation services.

## Known failure modes

- Malformed or missing email parameter returns a 400 validation error
- DNS lookup timeout if the domain's nameservers are slow or unreachable
- Disposable provider list may not cover newly created burner services
- SPF/DMARC parsing errors for malformed DNS records
- HTTP 402 payment required if x402 micropayment is not provided or fails
- Domain exists but MX records deliberately withheld, leading to false negatives

## 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-intel.agentdiet.dev/v1/mx-check)

## Output

Returns a structured object indicating whether the email is syntactically valid, whether the domain has live MX records (confirming mail can be received), whether SPF and DMARC DNS records are present and properly configured, whether the provider is a known disposable/burner service, and whether the address is a role account (e.g. admin@, info@).

## 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-intel-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-a6ddf204/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from shopify-intel.agentdiet.dev](https://www.zero.xyz/host/shopify-intel.agentdiet.dev/llms.txt)