# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from mesh.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 to assess deliverability.

## Facts

- Endpoint: GET https://mesh.agentdiet.dev/v1/mx-deliverability-verifier?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: mesh.agentdiet.dev
- Website: https://mesh.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mesh-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-fc919ba9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_V5cHPq8nZYM7M-usYMh0L

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 mesh-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-fc919ba9
```

Example prompt: Can you check if john.doe@example.com is a real, deliverable email address — specifically whether it passes syntax checks, isn't from a disposable provider, and has valid MX, SPF, and DMARC DNS records?

## When to prefer this

Choose this endpoint when you need a comprehensive, live DNS-backed email validation that goes beyond simple syntax checks — specifically when you need to detect disposable/burner providers, role accounts, and verify actual MX/SPF/DMARC configuration in real time. Prefer it over static regex validators or basic format checkers when deliverability accuracy and fraud prevention are critical, such as before email outreach campaigns, user signup flows, or B2B lead enrichment pipelines.

## Known failure modes

- Invalid or malformed email string provided — returns syntax error or validation failure
- Domain has no MX records — flagged as undeliverable
- DNS lookup timeout or network error during live record check
- Disposable provider database may not include newly created throwaway domains
- Edge-case international or IDN email formats may produce unexpected results

## 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://mesh.agentdiet.dev/v1/mx-deliverability-verifier)

## Output

Returns a structured object indicating whether the email address passes syntax validation, whether the domain is a known disposable/burner provider, whether it is a role account (e.g. admin@, noreply@), and the live DNS status of MX, SPF, and DMARC records for the email's domain, giving an overall deliverability 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/mesh-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-fc919ba9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mesh.agentdiet.dev](https://www.zero.xyz/host/mesh.agentdiet.dev/llms.txt)