# B2A Email Deliverability, MX, SPF & DMARC Verifier

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

## Facts

- Endpoint: GET https://polymarket-odds.agentdiet.dev/v1/email-validator?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: polymarket-odds.agentdiet.dev
- Website: https://polymarket-odds.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/polymarket-odds-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-a4ffd091
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_E8OsU2Dno0ecLyZssR9KJ

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 polymarket-odds-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-a4ffd091
```

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

## When to prefer this

Choose this endpoint when you need a comprehensive, single-call email health check that combines syntax validation, disposable/burner detection, role-account flagging, and live DNS MX/SPF/DMARC lookups — rather than simple format-only regex checks or separate DNS tooling. Particularly useful in B2B lead enrichment, user registration screening, and pre-send campaign validation pipelines where deliverability and email security posture both matter.

## Known failure modes

- Missing or malformed email parameter returns a validation error
- DNS lookup timeouts for domains with slow or unreachable nameservers
- Disposable provider list may not cover brand-new throwaway domains
- Domain exists but has no MX records — email is syntactically valid but undeliverable
- Payment required (HTTP 402) if x402 micropayment credential is absent or 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://polymarket-odds.agentdiet.dev/v1/email-validator)

## Output

Returns a structured JSON object indicating: whether the email address passes syntax validation, whether the domain is a known disposable or burner provider, whether the account appears to be a role-based address (e.g. info@, admin@), and the live DNS lookup results for MX (mail server existence), SPF (sender policy), and DMARC (domain-based message authentication) records.

## 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/polymarket-odds-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-a4ffd091/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from polymarket-odds.agentdiet.dev](https://www.zero.xyz/host/polymarket-odds.agentdiet.dev/llms.txt)