# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from llms-generator.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, and DMARC record checks.

## Facts

- Endpoint: GET https://llms-generator.agentdiet.dev/v1/mx-deliverability-verifier?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: llms-generator.agentdiet.dev
- Website: https://llms-generator.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/llms-generator-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-e3b171a4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9w9tZQDZBAfJFPGLPk0cS

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 llms-generator-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-e3b171a4
```

Example prompt: Can you check if john.doe@acmecorp.com is a real, deliverable email address — specifically whether it has valid MX records, passes SPF and DMARC checks, and isn't a disposable or role-based address?

## When to prefer this

Choose this endpoint when you need a comprehensive, real-time single-call check covering email syntax, disposable provider detection, role account screening, and live DNS MX/SPF/DMARC validation together — rather than separate tools for each concern. Ideal for lead enrichment pipelines, signup fraud prevention, CRM hygiene, and pre-send deliverability audits where a $0.005/call cost is acceptable for authoritative live DNS data.

## Known failure modes

- Missing or malformed email parameter returns a validation error
- Domain with no MX records returns deliverability failure
- DNS lookup timeout may cause incomplete record results
- Newly registered domains may not yet have propagated DNS records
- Private or internal domains (e.g. .local, .internal) may not resolve

## 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://llms-generator.agentdiet.dev/v1/mx-deliverability-verifier)

## Output

Returns structured validation results for the supplied email address including: syntax validity check, whether the domain uses a known disposable/burner provider, whether the address is a role account (e.g. admin@, info@), live DNS lookup results for MX records, SPF record presence and content, and DMARC policy record — together indicating overall email deliverability confidence.

## 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/llms-generator-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-e3b171a4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from llms-generator.agentdiet.dev](https://www.zero.xyz/host/llms-generator.agentdiet.dev/llms.txt)