# 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 2026-10-21).

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://alpha-stream.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: 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-e976928c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Qj5euR1KmNeCSnpAfYZ1Z

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-e976928c
```

Example prompt: Can you check whether john.doe@example.com is a valid, deliverable email — specifically whether the domain has working MX records, passes SPF and DMARC, and isn't a disposable or role address?

## When to prefer this

Use this endpoint when you need a comprehensive, single-call check covering email syntax, live DNS deliverability (MX), domain authentication posture (SPF/DMARC), and spam-risk signals (disposable/role) — especially during user onboarding, lead enrichment, or pre-campaign hygiene workflows where you want to avoid wasting sends on undeliverable or fraudulent addresses.

## Known failure modes

- Malformed or missing email parameter returns a validation error
- DNS lookup timeouts for slow-responding mail servers may produce inconclusive MX results
- Newly registered domains may lack MX/SPF/DMARC records even for legitimate addresses
- Disposable provider lists may not include very new or obscure burner services
- Non-existent TLDs or syntactically impossible addresses return immediate syntax failure

## 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 passes syntax validation, whether the domain has live MX records (meaning it can receive email), whether SPF and DMARC DNS records are present, whether the address belongs to a known disposable/burner email provider, and whether it is a role-based address (e.g. info@, support@, 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-e976928c/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)