# 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 checks.

## Facts

- Endpoint: GET https://whale-momentum.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: 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-253ec910
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yARl9JiJpbYx7-UJTGmTy

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-253ec910
```

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

## When to prefer this

Choose this endpoint when you need a single API call that combines email syntax checking, disposable/burner domain detection, role account flagging, and live DNS MX/SPF/DMARC record validation — rather than piecing together separate DNS lookup and blocklist tools. It is especially useful for signup fraud prevention, CRM data hygiene, or pre-send email campaign validation where deliverability and authenticity both matter. It is priced per-call at $0.005 USD via x402 micropayment, making it cost-effective for high-volume validation workflows.

## Known failure modes

- Missing or malformed email parameter returns a validation error
- DNS lookup timeout if the email domain is unreachable or DNS is slow
- Unknown or very new domains may lack MX/SPF/DMARC records even if legitimate
- Disposable provider database may not include the most recently created burner services
- Payment failure (HTTP 402) if x402 micropayment is not honored by the calling agent

## 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/disposable-email)

## Output

Returns a structured object indicating whether the email passes syntax validation, whether the domain belongs to a known disposable/burner email provider, whether the address is a role account (e.g. admin@, info@), and live DNS lookup results for the domain's MX, SPF, and DMARC records including their values and presence 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/whale-momentum-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-253ec910/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)