# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from token-intel.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-28).

Validates an email address for syntax correctness, disposable/burner status, role-account detection, and live DNS MX/SPF/DMARC record checks.

## Facts

- Endpoint: POST https://token-intel.agentdiet.dev/v1/spf-dmarc-auditor?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Provider: token-intel.agentdiet.dev
- Website: https://token-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/token-intel-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-2edfbb69
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8gQuRL8um2BHy2lHRnoRP

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 token-intel-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-2edfbb69 -d '<json body>'
```

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

## When to prefer this

Choose this endpoint when you need a single call that combines email syntax checking, disposable-provider detection, role-account flagging, and live DNS authentication record auditing (MX, SPF, DMARC) — rather than calling separate services for each layer. Particularly useful for CRM enrichment pipelines, signup fraud prevention, and cold outreach list hygiene where deliverability and authentication posture both matter.

## Known failure modes

- Invalid or missing email field returns a validation error
- DNS lookup timeout if the domain's nameservers are slow or unresponsive
- Unknown or newly registered domains may lack MX/SPF/DMARC records, returning empty results rather than an error
- Disposable provider databases may not include the very latest burner domains
- Payment failure via x402 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://token-intel.agentdiet.dev/v1/spf-dmarc-auditor)

## 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@, admin@), and live DNS lookup results for MX records (deliverability), SPF policy, and DMARC policy for the email's 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/token-intel-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-2edfbb69/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from token-intel.agentdiet.dev](https://www.zero.xyz/host/token-intel.agentdiet.dev/llms.txt)