# 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 2026-10-21).

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

## Facts

- Endpoint: GET https://token-intel.agentdiet.dev/v1/email?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-1d18f196
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dPkw8T_Q7CLTXoJI-IsYz

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-1d18f196
```

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

## When to prefer this

Choose this endpoint when you need a comprehensive, live email deliverability check that combines syntax validation, DNS record verification (MX, SPF, DMARC), disposable provider detection, and role account flagging in a single API call. Prefer it over simple regex validators when you need real-time DNS confirmation, or over domain-only checkers when you need full email-level analysis. Especially useful in B2B lead enrichment, fraud prevention at signup, and pre-send email list hygiene workflows.

## Known failure modes

- Invalid or missing email parameter returns an error response
- DNS lookup timeouts may cause MX/SPF/DMARC checks to fail or return inconclusive results
- Newly registered domains may not yet have propagated DNS records, producing false negatives
- Disposable provider lists may not be exhaustive, missing newer burner services
- Payment not satisfied (HTTP 402) if the x402 payment header is absent or invalid

## 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)

## Output

Returns a structured object indicating whether the email is syntactically valid, whether the domain has live MX records, whether SPF and DMARC DNS records exist and are properly configured, whether the address belongs to a known disposable or burner email provider, and whether it is a role-based account (e.g., info@, support@, noreply@).

## 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-1d18f196/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)