# 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 status, role account detection, and live DNS MX/SPF/DMARC record checks to confirm deliverability.

## Facts

- Endpoint: GET https://json-repair.agentdiet.dev/v1/email-check?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-be6a2e09
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Yg-tiI14AVZ_ORvbRPd3Q

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-be6a2e09
```

Example prompt: Can you check if john.doe@acme-corp.com is a real, deliverable email address — verify the syntax, check the MX records, and flag it if it's from a disposable provider or a role account like info@ or noreply@?

## When to prefer this

Choose this endpoint when you need a comprehensive, multi-signal email validation that goes beyond simple syntax checking — specifically when you need live DNS MX/SPF/DMARC lookups combined with disposable provider and role-account detection in a single call. Ideal for lead enrichment pipelines, signup fraud prevention, and cold outreach pre-flight checks. Prefer over simpler regex-only validators when real deliverability confirmation matters.

## Known failure modes

- Invalid or missing email parameter returns an error response
- Domain with no MX records will fail deliverability check
- Temporary DNS lookup failures may produce inconclusive results
- Newly registered domains may not yet have SPF/DMARC records even if legitimate
- Private or internal domains may appear to fail even if valid

## 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-check)

## Output

Returns a structured JSON object indicating whether the email passes syntax checks, whether the domain belongs to a known disposable/burner provider, whether it is a role-based account (e.g. info@, admin@), and live DNS lookup results for MX (mail exchange), SPF (sender policy framework), and DMARC (domain-based message authentication) records — giving a full deliverability and security profile for the email address.

## 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-be6a2e09/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)