# 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 status, role account detection, and live DNS MX, SPF, and DMARC record health.

## Facts

- Endpoint: GET https://alpha-stream.agentdiet.dev/v1/spf-dmarc-auditor?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-bfd5fdbd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bJ_Uu4ZePHQ8Qh6kGCn9V

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-bfd5fdbd
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email — specifically whether it's from a disposable provider, has valid MX records, and has SPF and DMARC properly configured?

## When to prefer this

Choose this endpoint when you need a combined, single-call check covering email syntax, disposable provider detection, role account classification, and live DNS MX/SPF/DMARC record verification. It is especially useful for lead validation, user registration gatekeeping, and email security audits where you need more than a simple format check — particularly when you need live DNS lookups rather than static pattern matching.

## Known failure modes

- Missing or malformed email parameter returns a validation error
- DNS lookup timeout if the domain's nameservers are unresponsive
- False negatives on newly created disposable domains not yet in blocklists
- Role account detection may miss uncommon role prefixes
- SPF/DMARC parsing may be incomplete for complex multi-record configurations
- Payment failure (HTTP 402) if USDC balance is insufficient

## 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/spf-dmarc-auditor)

## Output

Returns a structured object indicating whether the email address passes syntax checks, whether the domain is associated with a disposable or burner provider, whether it is a role-based account (e.g. admin@, support@), and the live DNS health of MX, SPF, and DMARC records for the domain.

## 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-bfd5fdbd/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)