# 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 2026-10-21).

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://email-verify.agentdiet.dev/v1/email-validator?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-a59d22a0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jwdrB0C_jc0h_X9BwdAry

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-a59d22a0
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email address — I want to know if it has valid MX records, whether the domain uses SPF and DMARC, and if it's from a disposable or burner provider?

## When to prefer this

Choose this endpoint when you need a comprehensive, live validation of an email address that goes beyond simple syntax checking — specifically when you need DNS-level MX record verification, SPF/DMARC configuration checks, disposable provider detection, and role account flagging all in a single call. Prefer this over generic email regex checks when building lead qualification pipelines, email list hygiene workflows, or fraud/spam screening systems where deliverability and provider reputation matter.

## Known failure modes

- Invalid or malformed email address returns a syntax error flag
- Domain with no MX records returns an undeliverable status
- DNS lookup timeouts may result in inconclusive MX/SPF/DMARC results
- Newly registered disposable domains may not yet be in blocklists
- Missing required 'email' query parameter returns a 400 error
- Payment not fulfilled returns HTTP 402 before validation occurs

## 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-validator)

## Output

Returns a structured object indicating whether the email address passes syntax validation, whether the domain has live MX records (confirming deliverability), SPF and DMARC DNS record presence and details, whether the provider is a known disposable/burner service, and whether the local-part is a role account (e.g. admin@, info@).

## 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-a59d22a0/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)