# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from workflows.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://workflows.agentdiet.dev/v1/email?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: workflows.agentdiet.dev
- Website: https://workflows.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/workflows-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-160a884e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pePFjr605T1nfL1JGLve-

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 workflows-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-160a884e -d '<json body>'
```

Example prompt: Can you verify whether john.doe@example.com is a real, deliverable email — check if it's a disposable address, a role account, and whether the domain has valid MX, SPF, and DMARC records?

## When to prefer this

Choose this endpoint when you need a comprehensive, real-time email validation that goes beyond simple regex checks — specifically when you need live DNS MX, SPF, and DMARC verification combined with disposable provider detection and role account flagging in a single API call. It is particularly valuable for B2B lead enrichment pipelines, sign-up fraud prevention, and cold outreach quality control where email deliverability directly impacts business outcomes.

## Known failure modes

- Invalid or malformed email string returns a syntax error response
- Domain with no MX records returns a non-deliverable result
- DNS lookup timeout may result in inconclusive deliverability status
- Rate limiting or payment failure (HTTP 402) if USDC balance is insufficient
- Temporarily unreachable DNS servers may cause incomplete SPF/DMARC 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://workflows.agentdiet.dev/v1/email)

## Output

Returns a structured object indicating whether the email passes syntax validation, whether the domain is associated with a disposable/burner provider, whether the address is a role account (e.g. info@, admin@), and the live DNS lookup results for MX, SPF, and DMARC records including their values and validity status.

## 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/workflows-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-160a884e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from workflows.agentdiet.dev](https://www.zero.xyz/host/workflows.agentdiet.dev/llms.txt)