# 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 detection, role account identification, and live DNS MX/SPF/DMARC record checks to assess deliverability.

## Facts

- Endpoint: GET https://sec-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: 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-71294769
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_B_etAJtlNhmqcfInxR_CU

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-71294769
```

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

## When to prefer this

Choose this endpoint when you need a comprehensive, live email validation that goes beyond syntax checking — specifically when you need real-time DNS MX/SPF/DMARC lookups combined with disposable provider and role account detection in a single call. Prefer this over simple regex validators when onboarding users, scrubbing lead lists, or assessing email security posture. It is especially useful for agents that need to make automated trust decisions about email addresses without a separate DNS lookup service.

## Known failure modes

- Missing or malformed email parameter returns a 400 error
- DNS lookup timeout for domains with slow or unreachable nameservers
- False negatives on newly registered disposable providers not yet in blocklists
- Role account detection may miss unusual role prefixes
- Payment failure via x402 if USDC balance is insufficient
- Domains with intentionally missing DNS records may be flagged as undeliverable even if valid

## 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/email)

## Output

Returns a structured assessment of the email address including: syntax validity, whether the domain belongs to a known disposable/burner provider, whether it is a role-based account (e.g. info@, noreply@), live DNS MX record presence and values, SPF record existence and policy, and DMARC record existence and policy — collectively indicating whether the email is likely deliverable and trustworthy.

## 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-71294769/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)