# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from email-verify.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 existence.

## Facts

- Endpoint: POST https://email-verify.agentdiet.dev/v1/disposable-email?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: email-verify.agentdiet.dev
- Website: https://email-verify.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/email-verify-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-dec7f0d8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HiVu3XmZiig3FNvgbspLT

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 email-verify-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-dec7f0d8 -d '<json body>'
```

Example prompt: Can you check whether john.doe@tempmail.com is a real, deliverable email address — specifically flag if it's a disposable or burner provider, and whether its domain has valid MX, SPF, and DMARC records?

## When to prefer this

Choose this endpoint when you need a comprehensive, single-call email quality check that combines syntax validation, disposable-provider detection, role-account flagging, and live DNS MX/SPF/DMARC verification — especially in agentic or automated B2B workflows where email deliverability and fraud risk both matter. Prefer it over simpler regex-only validators when DNS record health is important, or over domain-only DMARC checkers when you also need per-address disposable and role-account signals.

## Known failure modes

- Invalid or missing email field returns a 400 validation error
- DNS lookup timeouts for obscure or newly registered domains may return inconclusive MX/SPF/DMARC results
- Legitimate domains using non-standard DNS configurations may be falsely flagged
- Disposable provider list may not include the very latest burner services
- Payment failure (402) if x402 payment is not properly attached to the request

## 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://email-verify.agentdiet.dev/v1/disposable-email)

## Output

Returns a structured object indicating whether the email passes syntax validation, whether the domain is a known disposable/burner provider, whether the address appears to be a role account, and the live DNS lookup results for MX, SPF, and DMARC records — giving a comprehensive deliverability and fraud-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/email-verify-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-dec7f0d8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from email-verify.agentdiet.dev](https://www.zero.xyz/host/email-verify.agentdiet.dev/llms.txt)