# 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 checks.

## Facts

- Endpoint: GET https://alpha-stream.agentdiet.dev/v1/mx-deliverability-verifier?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-fc0ebe67
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wkK5pppow9oEVTgdeX-0b

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-fc0ebe67
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email — look up its MX, SPF, and DMARC records and flag it if it's a disposable or role address?

## When to prefer this

Choose this endpoint when you need a comprehensive, live DNS-backed email validation that goes beyond simple syntax checking — especially when you need to detect disposable/burner addresses, role accounts, and verify SPF/DMARC policies in a single call. Prefer it over basic regex validators when data quality, fraud prevention, or email deliverability are critical.

## Known failure modes

- Missing or malformed email parameter returns a validation error
- Domain has no MX records, indicating undeliverable address
- DNS lookup timeout for slow or non-responsive nameservers
- Ambiguous disposable provider status for lesser-known temporary email services
- Payment required error (HTTP 402) if x402 micropayment is not provided

## 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/mx-deliverability-verifier)

## Output

Returns a structured object indicating email syntax validity, whether the domain is a known disposable/burner provider, whether the address is a role account (e.g. info@, support@), and live DNS lookup results for MX, SPF, and DMARC records — giving a comprehensive deliverability 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/alpha-stream-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-fc0ebe67/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)