# 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 detection, role account flags, and live DNS MX, SPF, and DMARC record checks.

## Facts

- Endpoint: GET https://domain-osint.agentdiet.dev/v1/email-validator?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-26d8813c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_La_02QjjyTpf_ifj6d9uO

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-26d8813c
```

Example prompt: Can you check whether john.doe@tempmail.org is a real, deliverable email address — specifically whether it's from a disposable provider, and whether the domain has valid MX, SPF, and DMARC records set up?

## When to prefer this

Choose this endpoint when you need a comprehensive, real-time email quality check combining syntax validation, disposable provider detection, role account flagging, and live DNS MX/SPF/DMARC lookups in a single call — particularly useful for user onboarding flows, lead qualification pipelines, or pre-send campaign screening where deliverability and fraud risk both matter.

## Known failure modes

- Missing or malformed email parameter returns a validation error
- DNS lookup timeout for obscure or slow-resolving domains may return incomplete record data
- Newly created domains may not yet have propagated MX/SPF/DMARC records, causing false negatives
- Disposable provider lists may not cover brand-new throwaway services
- Non-existent TLDs or obviously invalid addresses return syntax failure immediately

## 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/email-validator)

## Output

Returns a structured object indicating whether the email address passes syntax checks, whether the domain is associated with a known disposable or burner provider, whether it is a role account (e.g. info@, admin@), and the live DNS status of MX, SPF, and DMARC records for the domain, enabling a holistic deliverability and risk 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/domain-osint-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-26d8813c/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)