# 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 checks.

## Facts

- Endpoint: GET https://hn-pulse.agentdiet.dev/v1/disposable-email?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-d065fb56
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_krDC0BvFV-Oe3HV24mH9A

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-d065fb56
```

Example prompt: Can you check whether john.doe@tempmail.com is a real, deliverable email or a disposable burner address — and also tell me if the domain has valid MX, SPF, and DMARC records?

## When to prefer this

Choose this endpoint when you need a comprehensive, single-call email validation that combines syntax checking, disposable provider detection, role account flagging, and live DNS verification (MX, SPF, DMARC) in one response. It is ideal for fraud prevention at signup, pre-flight checks before cold outreach, or CRM hygiene workflows where both inbox deliverability and domain email security posture matter.

## Known failure modes

- Missing or empty email parameter returns a 400 validation error
- Malformed email string that cannot be parsed returns a syntax-invalid response
- DNS lookup timeout or failure may result in inconclusive MX/SPF/DMARC results
- Payment failure (HTTP 402) if x402 USDC micropayment is not processed
- Domains with no public DNS records may return empty MX/SPF/DMARC fields

## 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/disposable-email)

## Output

Returns a structured object indicating whether the email address is syntactically valid, whether the domain is a known disposable/burner provider, whether it is a role account (e.g. admin@, support@), and live DNS lookup results for MX, SPF, and DMARC records, enabling a full deliverability and risk 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/hn-pulse-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-d065fb56/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)