# 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 2026-10-21).

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

## Facts

- Endpoint: GET https://workflows.agentdiet.dev/v1/disposable-email?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-0e9fc75c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5E2YEVgKKGzEJlVHyQVL8

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-0e9fc75c
```

Example prompt: Can you verify whether john.doe@tempmail.com is a real, deliverable email address — check if it's from a disposable provider, has valid MX records, and passes SPF and DMARC?

## When to prefer this

Choose this endpoint when you need a comprehensive, single-call email health check that combines syntax validation, disposable-provider detection, role-account identification, and live DNS MX/SPF/DMARC record verification — especially useful before user onboarding, email outreach campaigns, or fraud screening workflows. It is more thorough than simple regex or format-only validators.

## Known failure modes

- Missing or empty email parameter returns a 400 validation error
- Malformed email string may return syntax-invalid flag without DNS checks
- DNS lookup timeouts may cause MX/SPF/DMARC fields to return as unresolved or null
- Payment not completed (402) if x402 micropayment is not attached
- Rare disposable providers not in the blocklist may pass as legitimate

## 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/disposable-email)

## Output

Returns a structured JSON object indicating email syntax validity, whether the provider is a known disposable/burner service, whether the address appears to be a role account (e.g. info@, admin@), and live DNS lookup results for MX, SPF, and DMARC records on the domain.

## 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-0e9fc75c/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)