# 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 detection, role account flagging, and live DNS MX, SPF, and DMARC record checks.

## Facts

- Endpoint: GET https://polymarket-odds.agentdiet.dev/v1/spf-dmarc-auditor?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-f7429e26
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NWEafqlVWnX9yaECZHl5H

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-f7429e26
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email address — verify the syntax, look up the MX records, and tell me if the domain has SPF and DMARC set up and if it's a disposable or role account?

## When to prefer this

Choose this endpoint when you need a single-call comprehensive email check covering syntax, deliverability (live MX lookup), disposable/burner detection, role account flagging, and DNS email security (SPF/DMARC) in one shot — particularly in B2B lead enrichment, fraud prevention, or email campaign pre-screening workflows where multiple validation dimensions matter simultaneously.

## Known failure modes

- Missing or malformed email parameter returns a validation error
- DNS lookup timeouts may cause MX/SPF/DMARC checks to fail or return incomplete results
- Newly registered domains may not yet have propagated DNS records, leading to false negatives
- Disposable provider database may not cover all burner services, leading to missed detections
- Payment failure (HTTP 402) if USDC balance is 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/spf-dmarc-auditor)

## Output

Returns a structured object indicating email syntax validity, whether the domain is a known disposable/burner provider, whether the address is a role account (e.g. info@, admin@), live DNS MX record lookup results, SPF record presence and content, and DMARC record presence and policy — giving a comprehensive picture of deliverability and email security posture.

## 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-f7429e26/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)