# 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/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-c670a243
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_d5256lnPqsGQAS83p8d-N

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-c670a243
```

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

## When to prefer this

Choose this endpoint when you need a comprehensive, real-time email hygiene check that goes beyond simple syntax validation — specifically when you need live DNS MX resolution combined with SPF/DMARC policy checks and disposable-provider detection in a single call. It is well-suited for lead qualification pipelines, user registration fraud prevention, and email outreach pre-screening where deliverability and domain reputation all matter.

## Known failure modes

- Invalid or malformed email input returns a syntax error response
- DNS lookup timeouts may cause MX/SPF/DMARC checks to fail or return incomplete results
- Unknown or very new domains may not resolve, producing uncertain deliverability status
- Rate limits or payment failures (HTTP 402) block the request
- Disposable provider lists may not include every burner service, producing false negatives

## 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/email)

## Output

Returns a structured object indicating whether the email address is syntactically valid, whether the domain has live MX records enabling mail delivery, SPF and DMARC DNS record presence and policy details, whether the provider is a known disposable or burner service, and whether the address appears to be a role account (e.g. admin@, noreply@).

## 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-c670a243/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)