# 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 2026-10-23).

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: POST https://hn-pulse.agentdiet.dev/v1/mx-deliverability-verifier?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- 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-3ab4c6aa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CFzT2FLGqMyXB91SGPJ7o

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-3ab4c6aa -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 address, and confirm the domain has valid MX, SPF, and DMARC records set up?

## When to prefer this

Choose this endpoint when you need a comprehensive, real-time email validation that goes beyond syntax checking — specifically when you need live DNS MX, SPF, and DMARC record verification combined with disposable provider and role account detection in a single API call. Prefer this over lightweight regex-only validators when email deliverability and domain authentication posture matter, such as before CRM ingestion, outreach campaigns, or user signup flows.

## Known failure modes

- Invalid or malformed email input returns a syntax error or validation failure
- DNS lookup timeout if the email domain has slow or unresponsive nameservers
- Unknown or very new domains may have no MX/SPF/DMARC records, returned as missing
- Payment failure via x402 if USDC balance is insufficient
- Network errors during live DNS resolution may cause partial results

## 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-deliverability-verifier)

## Output

Returns a structured object indicating email syntax validity, whether the provider is a known disposable or burner service, whether the address is a role account (e.g. admin@, info@), and the results of live DNS lookups for MX, SPF, and DMARC records on the email's domain, including deliverability 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-3ab4c6aa/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)