# 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 2026-10-23).

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

## Facts

- Endpoint: POST https://token-intel.agentdiet.dev/v1/email-verify?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- 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-3608584d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2U3U0Aq5ej3-cLWtACSnt

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-3608584d -d '<json body>'
```

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

## When to prefer this

Choose this endpoint when you need a single-call, multi-signal email verification that combines syntax checking, disposable/burner detection, role-account flagging, and live DNS MX/SPF/DMARC record inspection. Prefer it over simple regex validators when deliverability and domain security posture both matter, and over generic WHOIS tools when you specifically need email-level DNS health. Especially useful in B2B lead enrichment pipelines, user onboarding flows, and marketing list hygiene where fake or undeliverable emails must be screened.

## Known failure modes

- Malformed or empty email input returns a validation error
- DNS lookup timeouts may result in inconclusive MX/SPF/DMARC results for slow-responding nameservers
- Unknown or very new domains may not have SPF/DMARC records, returning absence flags rather than errors
- Payment not fulfilled returns HTTP 402 blocking the request
- Rate limits or service unavailability return 5xx errors

## 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/email-verify)

## Output

Returns a structured object indicating whether the email passed syntax validation, whether the domain belongs to a known disposable or burner provider, whether the address is a role account (e.g. admin@, info@), and the live DNS status of MX, SPF, and DMARC records for the email's domain — giving a comprehensive deliverability and trust 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/token-intel-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-3608584d/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)