# 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 health.

## Facts

- Endpoint: GET https://email-verify.agentdiet.dev/v1/spf-dmarc-auditor?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-b76b2f0e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SZsIkFlSk2fxQZvRkAp8-

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-b76b2f0e
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email address — look at its MX records, SPF and DMARC setup, and flag it if it's a disposable or role account?

## When to prefer this

Choose this endpoint when you need a comprehensive, single-call validation that covers both email address hygiene (syntax, disposable detection, role accounts) and DNS-level email security posture (MX, SPF, DMARC) in one request. Prefer it over basic syntax-only validators when deliverability and anti-spam signal accuracy matter, or over domain-only DMARC checkers when you need to verify a specific email address end-to-end.

## Known failure modes

- Invalid or malformed email address returns a syntax error response
- Domain has no MX records — flagged as undeliverable
- DNS lookup timeout or failure for MX/SPF/DMARC records
- Payment not provided or insufficient (HTTP 402) — request blocked
- Rate limiting exceeded — HTTP 429 returned
- Domain exists but has no SPF or DMARC records — returned as missing/unconfigured

## 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/spf-dmarc-auditor)

## Output

Returns a structured JSON object indicating email syntax validity, whether the domain is a known disposable/burner provider, whether the address is a role account (e.g. info@, admin@), live MX record existence and values, SPF record presence and policy, and DMARC record presence and policy — giving a full deliverability and email security posture for the provided 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-b76b2f0e/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)