# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from domain-osint.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 presence.

## Facts

- Endpoint: GET https://domain-osint.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: domain-osint.agentdiet.dev
- Website: https://domain-osint.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/domain-osint-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-d5562f91
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rPdZch1kLDnl_dE8DZMkC

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 domain-osint-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-d5562f91
```

Example prompt: Can you check whether john.doe@tempmail.org is a real, deliverable email address — flag if it's a disposable provider, a role account, or if the domain is missing MX, SPF, or DMARC records?

## When to prefer this

Choose this endpoint when you need a single-call, comprehensive email verification that combines syntax checking, disposable/burner detection, role account flagging, and live DNS MX/SPF/DMARC auditing — especially useful for fraud prevention, user onboarding pipelines, B2B lead qualification, or pre-send email list hygiene. Prefer it over basic regex validators when real-time DNS deliverability and email security posture matter.

## Known failure modes

- Missing or malformed email parameter returns a validation error
- DNS lookup timeouts may prevent live MX/SPF/DMARC checks from completing
- Unknown or newly registered domains may return incomplete DNS data
- Private or internal domains may not resolve publicly
- Payment failure (402) if x402 micropayment is not properly handled

## 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://domain-osint.agentdiet.dev/v1/spf-dmarc-auditor)

## Output

Returns a structured object indicating: email syntax validity, whether the domain is a known disposable/burner provider, whether the address is a role account (e.g. admin@, noreply@), and live DNS lookup results for MX, SPF, and DMARC records — enabling a full deliverability and security posture assessment for the given email 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/domain-osint-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-d5562f91/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from domain-osint.agentdiet.dev](https://www.zero.xyz/host/domain-osint.agentdiet.dev/llms.txt)