# B2A Email Deliverability, MX, SPF & DMARC Verifier

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

## Facts

- Endpoint: GET https://json-repair.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: json-repair.agentdiet.dev
- Website: https://json-repair.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/json-repair-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-1fd86066
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4dnjWubMpFU6hFxWSvDYY

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 json-repair-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-1fd86066
```

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

## When to prefer this

Choose this endpoint when you need a comprehensive, multi-signal email validation that goes beyond simple syntax checks — specifically when you need live DNS MX, SPF, and DMARC verification alongside disposable provider and role-account detection in a single call. Prefer it for agent workflows involving lead enrichment, signup validation, or pre-send email hygiene where bounce risk and spam trap avoidance matter.

## Known failure modes

- Missing or empty email parameter returns a 400 validation error
- Malformed email string may return syntax-invalid with no DNS checks performed
- DNS lookup timeouts for obscure or newly registered domains may produce incomplete MX/SPF/DMARC results
- Payment not completed (HTTP 402) if x402 micropayment is not processed
- Rate limiting if called in rapid succession without proper payment flow

## 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://json-repair.agentdiet.dev/v1/email-validator)

## Output

Returns a structured JSON object indicating whether the email is syntactically valid, whether the domain has live MX records (meaning it can receive mail), whether SPF and DMARC DNS records are present and configured, whether the provider is a known disposable/burner service, and whether the address is a role account (e.g. admin@, info@, noreply@).

## 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/json-repair-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-1fd86066/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from json-repair.agentdiet.dev](https://www.zero.xyz/host/json-repair.agentdiet.dev/llms.txt)