# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from cve-intel.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-28).

Validates an email address for syntax, disposable/burner provider status, role account detection, and live DNS MX/SPF/DMARC record checks to assess deliverability.

## Facts

- Endpoint: POST https://cve-intel.agentdiet.dev/v1/email-validator?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Provider: cve-intel.agentdiet.dev
- Website: https://cve-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/cve-intel-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-a480b99e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5TbxD-h2vb5rrl4qZQs6Z

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 cve-intel-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-a480b99e -d '<json body>'
```

Example prompt: Can you check if john.doe@example.com is a real, deliverable email address — verify the syntax, look up the MX records, and flag it if it's a disposable or role-based account?

## When to prefer this

Choose this endpoint when you need a comprehensive, live email validation that goes beyond simple format checking — specifically when you need real-time DNS MX/SPF/DMARC verification combined with disposable provider and role account detection in a single call. Prefer this over lightweight regex-only validators when deliverability and fraud risk matter, such as before importing contacts into a CRM, screening signups, or qualifying B2B leads.

## Known failure modes

- Invalid or malformed email syntax returns a syntax error flag
- DNS lookup timeout for MX/SPF/DMARC if the domain's nameservers are slow or unresponsive
- Domain does not exist (NXDOMAIN) results in no MX/SPF/DMARC records found
- Payment not completed (HTTP 402) blocks execution
- Missing required 'email' field returns a validation error

## 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://cve-intel.agentdiet.dev/v1/email-validator)

## Output

Returns a structured assessment including: email syntax validity, whether the domain uses a known disposable/burner provider, whether the address is a role account (e.g. admin@, info@), live DNS lookup results for MX records (mail servers), SPF record presence and configuration, and DMARC policy record — giving a complete deliverability and risk profile for the 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/cve-intel-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-a480b99e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cve-intel.agentdiet.dev](https://www.zero.xyz/host/cve-intel.agentdiet.dev/llms.txt)