# 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, and DMARC record checks.

## Facts

- Endpoint: GET https://polymarket-odds.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: 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-8c3833a0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PagrRg9qSboieZ96fCs8i

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-8c3833a0
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email address — specifically whether it passes syntax checks, isn't a disposable or burner domain, has valid MX records, and the domain has SPF and DMARC set up?

## When to prefer this

Choose this endpoint when you need a comprehensive, single-call email health check covering syntax, DNS deliverability (MX), email authentication (SPF/DMARC), disposable provider detection, and role-account flagging — especially useful in B2B lead enrichment, SaaS signup fraud prevention, or pre-campaign validation workflows where a single $0.005 lookup replaces multiple separate DNS and blocklist queries.

## Known failure modes

- Missing required 'email' parameter returns an error response
- Malformed email string may return syntax-invalid result without DNS checks
- DNS lookup timeout for obscure or offline domains may yield incomplete MX/SPF/DMARC results
- Payment required (HTTP 402) if x402 micropayment is not included
- Rate limiting if too many requests are made in a short window

## 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)

## Output

Returns a structured object indicating email syntax validity, whether the domain belongs to a known disposable or burner provider, whether it is a role-based account (e.g. admin@, support@), and live DNS lookup results including MX records (deliverability), SPF policy, and DMARC policy for the email's domain.

## 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-8c3833a0/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)