# 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.

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?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- 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-425d30b4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zxJVbauVhMzxgXvcdD04b

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-425d30b4
```

Example prompt: Can you verify whether john.doe@example.com is a real, deliverable email address — check if it's from a disposable provider, if it's a 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, multi-signal email validation in a single call — combining syntax checking, disposable/burner detection, role-account flagging, and live DNS record verification (MX, SPF, DMARC) — rather than a simple format check or a dedicated single-signal service. Ideal for lead enrichment pipelines, signup fraud prevention, mailing list hygiene, and any workflow requiring high confidence in email deliverability and authentication posture before sending.

## Known failure modes

- Missing or empty email parameter returns a 400 validation error
- Malformed email string that cannot be parsed returns a syntax-invalid result
- DNS lookup timeout for obscure or newly registered domains may return incomplete MX/SPF/DMARC data
- Payment not completed (HTTP 402) if x402 payment header is missing or insufficient
- Temporary DNS failures may cause intermittent MX lookup errors for valid domains
- Disposable provider list may not cover very new throwaway services

## 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)

## Output

Returns a structured object indicating email syntax validity, whether the address belongs to a known disposable or burner provider, whether it is a role-based account (e.g. info@, admin@), and live DNS lookup results for MX records (confirming the domain accepts mail), SPF policy, and DMARC policy — collectively indicating whether the email is likely deliverable and trustworthy.

## 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-425d30b4/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)