# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from company-enrich.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 presence.

## Facts

- Endpoint: GET https://company-enrich.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: company-enrich.agentdiet.dev
- Website: https://company-enrich.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/company-enrich-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-6aa800d5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KXxapIUYO3tbXkmO60ZEW

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 company-enrich-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-6aa800d5
```

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 health check combining syntax validation, disposable provider detection, role-account flagging, and real-time DNS MX/SPF/DMARC record verification in a single call — particularly for B2B lead enrichment pipelines, signup form screening, or pre-send deliverability audits where accuracy matters more than speed alone.

## Known failure modes

- Invalid or malformed email string returns a syntax error response
- Domain does not exist in DNS — no MX records found, deliverability flagged as false
- DNS lookup timeout or temporary failure may result in inconclusive MX/SPF/DMARC results
- Disposable provider list may not cover every newly created throwaway service
- Payment not provided or x402 payment fails — request rejected with 402 status

## 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://company-enrich.agentdiet.dev/v1/mx-check)

## Output

Returns a structured response indicating whether the email address is syntactically valid, whether the domain has live MX records (confirming mail can be received), whether SPF and DMARC DNS records are present, whether the address belongs to a known disposable or burner email provider, and whether it is a role-based account (e.g. info@, support@, admin@).

## 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/company-enrich-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-6aa800d5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from company-enrich.agentdiet.dev](https://www.zero.xyz/host/company-enrich.agentdiet.dev/llms.txt)