# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from alpha-stream.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://alpha-stream.agentdiet.dev/v1/email-check?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: alpha-stream.agentdiet.dev
- Website: https://alpha-stream.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/alpha-stream-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-0ae85da5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qguQK8bUM-MLCTWkERnw8

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 alpha-stream-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-0ae85da5 -d '<json body>'
```

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

## When to prefer this

Choose this endpoint when you need a comprehensive, live email deliverability check that goes beyond simple regex validation — particularly when you need DNS-level MX, SPF, and DMARC verification alongside disposable provider and role account detection in a single call. It is especially suited for agent workflows that require real-time email quality gating at signup, lead enrichment, or pre-send list scrubbing, and it supports x402 micropayment for per-call billing without subscription overhead.

## Known failure modes

- Invalid or malformed email input returns a syntax error
- DNS lookup timeout for MX/SPF/DMARC records if the domain is slow or unresponsive
- Domain does not exist, resulting in no MX records found
- Payment required (HTTP 402) if x402 micropayment header is missing or invalid
- Rate limiting if too many requests are made in quick succession

## 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://alpha-stream.agentdiet.dev/v1/email-check)

## Output

Returns a structured object indicating whether the email passed syntax validation, whether the domain has live MX records, SPF record presence and validity, DMARC policy configuration, whether the address appears to be from a disposable/burner provider, and whether it is a role-based account (e.g. info@, admin@).

## 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/alpha-stream-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-0ae85da5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from alpha-stream.agentdiet.dev](https://www.zero.xyz/host/alpha-stream.agentdiet.dev/llms.txt)