# 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 verification.

## Facts

- Endpoint: GET https://email-verify.agentdiet.dev/paid?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-774ad4b9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_58T-2x9q56jOoB138IPLD

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-774ad4b9
```

Example prompt: Can you verify whether john.doe@example.com is a real, deliverable email address — check if it's disposable or a role account, and confirm 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 that goes beyond simple syntax checking — especially when you need live DNS MX, SPF, and DMARC verification in a single call alongside disposable provider and role account detection. Ideal for SaaS signups, B2B lead enrichment pipelines, and email campaign hygiene where fraudulent, undeliverable, or role-based addresses must be caught before sending.

## Known failure modes

- Missing or malformed email parameter returns an error
- DNS lookup timeout if the domain's nameservers are unresponsive
- Unknown disposable provider may not be flagged if not in the database
- Payment not processed results in HTTP 402 response blocking the lookup
- Very new domains may have incomplete DNS propagation affecting MX/SPF/DMARC results

## 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/paid)

## Output

Returns a structured object indicating whether the email address passes syntax validation, whether the domain is associated with a known disposable or burner email provider, whether it is a role-based address (e.g. info@, support@), and the live DNS lookup results for MX, SPF, and DMARC records — enabling a complete deliverability 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-774ad4b9/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)