# 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/DMARC record checks.

## Facts

- Endpoint: GET https://email-verify.agentdiet.dev/api?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-c03f4461
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XFSbUXuwvH2b8ao7r0rsN

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-c03f4461
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email address — specifically whether it passes syntax checks, has working MX records, and isn't from a disposable or burner provider?

## When to prefer this

Choose this endpoint when you need a comprehensive, live email validation that goes beyond simple syntax checks — specifically when you need to confirm DNS-level deliverability (MX records), detect throwaway/burner addresses, identify role accounts, and verify SPF/DMARC policy presence in a single call. Prefer this over basic regex validators or static blocklist checkers when real-time DNS accuracy matters, such as during lead qualification, signup fraud prevention, or pre-campaign email hygiene.

## Known failure modes

- Missing or malformed email parameter returns an error response
- DNS lookup timeouts for obscure or newly registered domains may result in inconclusive MX/SPF/DMARC results
- Disposable provider detection may miss very new or niche burner services not yet in the blocklist
- Payment required (HTTP 402) if x402 micropayment is not included or fails
- Extremely long or unusual email strings may fail syntax parsing edge cases

## 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/api)

## Output

Returns a structured object indicating whether the email passes syntax validation, whether the domain has live MX records, whether SPF and DMARC DNS records are present and configured, whether the provider is a known disposable/burner service, and whether the address appears to be a role account (e.g. info@, admin@).

## 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-c03f4461/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)