# 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 detection, role account identification, and live DNS checks for MX, SPF, and DMARC records.

## Facts

- Endpoint: GET https://email-verify.agentdiet.dev/v1/email-check?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-7f0a80f9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6FxMsN5456udpsuGiq1eI

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-7f0a80f9
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email address — specifically whether it has valid MX records, isn't from a disposable provider, and has SPF and DMARC configured?

## 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/DMARC verification combined with disposable provider and role account detection in a single call. Prefer this over generic email regex checkers when deliverability assurance and fraud/burner detection are required, such as during user onboarding, lead enrichment, or pre-campaign list hygiene.

## Known failure modes

- Invalid or malformed email input returns a syntax error or validation failure
- DNS lookup timeout for domains with slow or unresponsive nameservers
- Non-existent domain returns no MX records found
- Payment required (HTTP 402) if x402 micropayment is not included
- Rate limiting if too many requests are sent in quick succession

## 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-check)

## Output

Returns a structured object indicating whether the email address passes syntax validation, whether the domain is associated with a known disposable or burner provider, whether it is a role-based account (e.g. admin@, info@), and the results of live DNS lookups for MX, SPF, and DMARC records — enabling an agent to determine overall deliverability and trust risk 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-7f0a80f9/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)