# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from whale-momentum.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 presence.

## Facts

- Endpoint: GET https://whale-momentum.agentdiet.dev/v1/email-check?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: whale-momentum.agentdiet.dev
- Website: https://whale-momentum.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/whale-momentum-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-e3a623c8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ivG4vNEq4MX9Y8crQE3Oz

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 whale-momentum-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-e3a623c8
```

Example prompt: Can you check whether john.smith@acmecorp.com is a real, deliverable email — including whether the domain has valid MX records and isn't a disposable or burner provider?

## When to prefer this

Choose this endpoint when you need a comprehensive, real-time email deliverability and legitimacy check that goes beyond simple syntax validation — specifically when you need live DNS MX record confirmation, SPF/DMARC policy presence, disposable provider detection, and role account flagging in a single API call. Prefer this over basic regex-only validators when data quality, fraud prevention, or email campaign hygiene is critical.

## Known failure modes

- Missing or malformed email parameter returns a validation error
- DNS lookup timeout or failure may cause incomplete MX/SPF/DMARC results
- Newly registered domains may not yet have propagated DNS records, causing false negatives
- Disposable provider databases may lag behind newly created burner services
- Non-existent TLDs or completely malformed addresses may return error responses

## 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://whale-momentum.agentdiet.dev/v1/email-check)

## Output

Returns a structured object indicating whether the email address passes syntax validation, whether the domain is associated with a known disposable or burner provider, whether the address appears to be a role account (e.g. admin@, noreply@), and whether live DNS MX, SPF, and DMARC records exist for the domain — giving a comprehensive deliverability and legitimacy 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/whale-momentum-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-e3a623c8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from whale-momentum.agentdiet.dev](https://www.zero.xyz/host/whale-momentum.agentdiet.dev/llms.txt)