# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from serp-extract.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-23).

Validates an email address for syntax correctness, disposable/burner provider status, role account detection, and live DNS MX, SPF, and DMARC record checks.

## Facts

- Endpoint: POST https://serp-extract.agentdiet.dev/v1/email-validator?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: serp-extract.agentdiet.dev
- Website: https://serp-extract.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/serp-extract-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-08ea9710
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KjbozKbLK6HSwYS77fqZ_

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 serp-extract-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-08ea9710 -d '<json body>'
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email — specifically whether the domain has valid MX records, isn't a disposable/burner provider, and passes SPF and DMARC checks?

## When to prefer this

Choose this endpoint when you need a comprehensive, single-call email verification covering syntax, live DNS MX/SPF/DMARC records, disposable provider detection, and role account flagging — particularly in B2B lead enrichment, signup fraud prevention, or pre-send deliverability pipelines. Prefer it over generic syntax-only validators when live DNS verification and disposable/burner detection are required.

## Known failure modes

- Missing or malformed email address field returns a validation error
- DNS timeout or unreachable nameservers may result in incomplete MX/SPF/DMARC data
- Very new or obscure domains may not have SPF/DMARC records configured, resulting in those fields being absent or null
- Payment failure via x402 returns HTTP 402 and the call is not processed
- Idempotency-Key collisions across retries may return cached prior results

## 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://serp-extract.agentdiet.dev/v1/email-validator)

## Output

Returns a structured object indicating email syntax validity, whether the address belongs to a known disposable or burner provider, whether it is a role account (e.g. admin@, noreply@), and the live DNS lookup results for MX, SPF, and DMARC records — giving a comprehensive deliverability and risk profile for the submitted 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/serp-extract-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-08ea9710/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from serp-extract.agentdiet.dev](https://www.zero.xyz/host/serp-extract.agentdiet.dev/llms.txt)