# B2A Email Deliverability, MX, SPF & DMARC Verifier

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

## Facts

- Endpoint: GET https://sec-intel.agentdiet.dev/v1/mx-deliverability-verifier?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: sec-intel.agentdiet.dev
- Website: https://sec-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/sec-intel-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-443a34b2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TwERsgkqc0QanSjFZ_7T5

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 sec-intel-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-443a34b2
```

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

## When to prefer this

Choose this endpoint when you need a comprehensive, live email deliverability check that goes beyond simple syntax validation — especially when you need disposable provider detection, role account flagging, and real-time DNS MX/SPF/DMARC verification in a single call. Prefer this over generic regex validators when building fraud-resistant signup flows, CRM hygiene pipelines, or pre-send email campaign checks.

## Known failure modes

- Missing or malformed email parameter returns a validation error
- DNS lookup timeout for domains with slow or unresponsive nameservers
- Unknown or newly registered domains may have incomplete DNS data
- Disposable provider lists may not cover very new burner services
- Rate limiting or payment failure (402) if USDC microtransaction is not settled

## 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://sec-intel.agentdiet.dev/v1/mx-deliverability-verifier)

## Output

Returns a structured object indicating whether the email passes syntax checks, whether the domain is a known disposable/burner provider, whether it's a role-based account (e.g. info@, noreply@), and the live DNS status of the domain's MX, SPF, and DMARC records — giving an overall deliverability assessment.

## 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/sec-intel-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-443a34b2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sec-intel.agentdiet.dev](https://www.zero.xyz/host/sec-intel.agentdiet.dev/llms.txt)