# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from x402broker.com, 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/DMARC record existence.

## Facts

- Endpoint: POST https://x402broker.com/v1/email-validator?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: x402broker.com
- Website: https://x402broker.com
- Canonical page: https://www.zero.xyz/c/x402broker-com-b2a-email-deliverability-mx-spf-dmarc-verifier-d3e38714
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_F1nJ81_J8kqE1rhf-Pzhg

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 x402broker-com-b2a-email-deliverability-mx-spf-dmarc-verifier-d3e38714 -d '<json body>'
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email address — specifically whether the domain has valid MX records, passes SPF and DMARC checks, and isn't from a disposable or burner provider?

## When to prefer this

Choose this endpoint when you need a single, comprehensive email health check covering syntax, DNS deliverability (MX), anti-spoofing records (SPF/DMARC), disposable provider detection, and role-account flagging in one call — ideal for lead qualification, user registration gating, or pre-campaign list hygiene where multiple signals matter together.

## Known failure modes

- Invalid or missing email input returns a 400 validation error
- DNS lookup timeout for obscure or slow domains may yield inconclusive MX/SPF/DMARC results
- Payment failure or insufficient balance returns HTTP 402
- Newly registered domains may have propagating DNS records, causing false negatives on MX/SPF checks
- Extremely long or unusual TLDs may not resolve correctly

## 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://x402broker.com/v1/email-validator)

## Output

Returns a structured object indicating whether the email address passes syntax checks, whether the domain has live MX records (confirming mail can be delivered), SPF and DMARC DNS record presence, whether the provider is a known disposable/burner service, and whether the address is a role account (e.g. info@, admin@, support@).

## 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/x402broker-com-b2a-email-deliverability-mx-spf-dmarc-verifier-d3e38714/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402broker.com](https://www.zero.xyz/host/x402broker.com/llms.txt)