# 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 checks.

## Facts

- Endpoint: POST https://email-verify.agentdiet.dev/v1/email-verify?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-4759bb7b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_n0P-BUUbgOdo6gVrsSjGZ

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-4759bb7b -d '<json body>'
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email address — including syntax, whether it's a disposable or role account, and whether the domain has valid MX, SPF, and DMARC records?

## When to prefer this

Choose this endpoint when you need a comprehensive, real-time email validation that goes beyond simple syntax checking — specifically when you need live DNS MX, SPF, and DMARC verification combined with disposable-provider and role-account detection in a single call. It is ideal for agent-driven user onboarding flows, lead enrichment pipelines, and pre-campaign email hygiene checks where you need actionable deliverability signals without integrating multiple separate tools.

## Known failure modes

- Invalid or malformed email string returns a syntax error or validation failure flag
- Domain has no MX records — returned as undeliverable
- DNS lookup timeout for live MX/SPF/DMARC records — may return partial results or error
- Unknown disposable provider not in blocklist — may return false negative on disposable check
- Payment not completed (HTTP 402) — request blocked if x402 payment not provided

## 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/email-verify)

## Output

Returns a structured object indicating whether the email is syntactically valid, whether the domain is a known disposable/burner provider, whether the address is a role account (e.g. admin@, info@), and the live DNS lookup results for MX, SPF, and DMARC records — effectively a full deliverability risk profile for the address.

## 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-4759bb7b/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)