# 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 2026-10-21).

Validates an email address for syntax correctness, disposable/burner provider status, role-account flags, and live DNS MX, SPF, and DMARC record presence.

## Facts

- Endpoint: GET https://cve-intel.agentdiet.dev/v1/email-validator?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-13741635
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_q9H9qbBvWqS0-t_CmPLhH

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-13741635
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email address — specifically if the domain has valid MX records, whether it's from a disposable provider, and if SPF and DMARC are set up?

## When to prefer this

Choose this endpoint when you need a comprehensive, real-time email validity check that combines syntax, disposability, role-account detection, and live DNS deliverability (MX/SPF/DMARC) in a single call. Prefer it over simple regex validators when you need to know if the domain can actually receive mail, or over basic MX checkers when you also need to catch burner and role accounts. Especially useful in agent workflows that gate user registration, CRM imports, or outreach lists on email quality.

## Known failure modes

- Missing or malformed email parameter returns a 400 validation error
- Domain with no DNS presence returns MX lookup failure but email still passes syntax check
- Temporary DNS resolution failures may cause false negatives on MX/SPF/DMARC lookups
- Payment required (HTTP 402) if x402 USDC payment header is missing or insufficient
- Disposable provider database may not cover very newly created burner domains

## 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 object indicating: whether the email passes syntax checks, whether the domain belongs to a known disposable/burner provider, whether the address is a role account (e.g. info@, noreply@), and the live DNS status of MX records (can the domain receive mail), SPF records (sender policy), and DMARC records (anti-spoofing policy).

## 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-13741635/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)