# 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 2026-10-23).

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

## Facts

- Endpoint: POST https://sec-intel.agentdiet.dev/v1/mx-check?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- 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-f75b32f0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_L2TH_YZ82FFOFOPX6ZCzK

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-f75b32f0 -d '<json body>'
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email — flag if it's disposable or a role account, and tell me if the domain has valid MX, SPF, and DMARC records?

## When to prefer this

Choose this endpoint when you need a single-call, comprehensive email health check combining syntax validation, disposable detection, role-account flagging, and live DNS record verification (MX, SPF, DMARC) in one response — particularly useful in agentic workflows handling lead enrichment, user signup validation, or outreach hygiene at $0.005 per call via x402 micropayment.

## Known failure modes

- Malformed or missing email input returns a validation error
- Unresolvable domain (NXDOMAIN) returns no MX/SPF/DMARC data and a non-deliverable verdict
- Temporary DNS timeouts may cause incomplete record lookups
- Disposable provider lists may not cover newly created throwaway domains
- Payment failure (HTTP 402) if USDC balance is insufficient

## 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-check)

## Output

Returns a structured object indicating email syntax validity, whether the domain is from a known disposable/burner provider, whether the address is a role account (e.g. info@, admin@), and live DNS lookup results for MX records, SPF policy, and DMARC policy — giving a comprehensive deliverability verdict.

## 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-f75b32f0/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)