# 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 detection, and live DNS MX, SPF, and DMARC record checks.

## Facts

- Endpoint: GET https://cve-intel.agentdiet.dev/v1/email?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-015d6ec0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bRwMy9RV_mooMZH5nHnVC

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-015d6ec0
```

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

## When to prefer this

Choose this endpoint when you need a comprehensive, single-call email verification that combines syntax checking, live DNS MX/SPF/DMARC lookups, disposable provider detection, and role account flagging — especially in agent workflows requiring fraud prevention, lead qualification, or deliverability assurance before sending email communications. Prefer this over simple regex-only validators when real-time DNS confirmation is required.

## Known failure modes

- Invalid or malformed email address returns a syntax error
- Domain does not exist or has no DNS records, resulting in MX lookup failure
- Disposable provider list may not cover newly created burner services
- Rate limiting or payment failure (HTTP 402) if USDC balance is insufficient
- DNS lookup timeouts for slow or unreachable nameservers

## 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)

## Output

Returns a structured object indicating whether the email has valid syntax, whether the domain has live MX records, the presence and validity of SPF and DMARC DNS records, whether the address belongs to a known disposable or burner email provider, and whether it appears to be a role-based account (e.g. info@, 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/cve-intel-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-015d6ec0/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)