# B2A Email Deliverability, MX, SPF & DMARC Verifier

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

## Facts

- Endpoint: GET https://hn-pulse.agentdiet.dev/v1/mx-check?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: hn-pulse.agentdiet.dev
- Website: https://hn-pulse.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/hn-pulse-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-39d63963
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gHuhOCC48OMQgswpMsz3o

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 hn-pulse-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-39d63963
```

Example prompt: Can you verify whether john.doe@acmecorp.com is a real, deliverable email — check its MX, SPF, and DMARC records and tell me if it's from a disposable or role-based provider?

## When to prefer this

Choose this endpoint when you need a real-time, multi-signal email check that goes beyond simple syntax validation — specifically when you need live DNS MX/SPF/DMARC record verification combined with disposable provider detection and role-account flagging in a single call. Ideal for lead enrichment pipelines, signup fraud prevention, and pre-send email campaign audits where deliverability confidence is critical.

## Known failure modes

- Missing or malformed email parameter returns a validation error
- Domains with no DNS records will return MX/SPF/DMARC as absent or unresolvable
- Temporary DNS lookup failures may return inconclusive results
- Very new domains may not yet have propagated DNS records
- Rate limiting or payment failure (HTTP 402) if USDC micropayment 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://hn-pulse.agentdiet.dev/v1/mx-check)

## Output

Returns a structured object containing email syntax validity, whether the domain uses a known disposable/burner provider, whether the address is a role account (e.g. info@, admin@), and live DNS lookup results for MX, SPF, and DMARC records — giving a clear picture of whether the email is safe and deliverable.

## 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/hn-pulse-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-39d63963/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from hn-pulse.agentdiet.dev](https://www.zero.xyz/host/hn-pulse.agentdiet.dev/llms.txt)