# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from email-verify.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 health.

## Facts

- Endpoint: GET https://email-verify.agentdiet.dev/v1?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: email-verify.agentdiet.dev
- Website: https://email-verify.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/email-verify-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-c35b22f8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jj_qJQCQARpLEaAEcFoeQ

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 email-verify-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-c35b22f8
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email — verify its syntax, DNS MX records, and whether it's a disposable or role-based address?

## When to prefer this

Choose this endpoint when you need a single, unified check covering email syntax, disposable/burner detection, role-account flagging, and live DNS record verification (MX, SPF, DMARC) in one call — especially in B2B lead enrichment pipelines, SaaS sign-up fraud prevention, or pre-campaign deliverability screening where DNS-level truth matters more than a simple format check.

## Known failure modes

- Missing or malformed email parameter returns a validation error
- DNS timeout for low-TTL or unreachable domains may result in inconclusive MX/SPF/DMARC results
- Non-existent TLDs or garbage input strings fail syntax validation immediately
- Private or internal domain names with no public DNS records return unresolvable status
- Payment not completed (HTTP 402) blocks the request under x402 micropayment protocol

## 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://email-verify.agentdiet.dev/v1)

## Output

Returns a structured object indicating: email syntax validity, whether the domain uses a known disposable/burner provider, whether the address is a role account (e.g. admin@, support@), live MX record presence and details, SPF record existence and content, and DMARC policy record status — giving an overall deliverability verdict.

## 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/email-verify-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-c35b22f8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from email-verify.agentdiet.dev](https://www.zero.xyz/host/email-verify.agentdiet.dev/llms.txt)