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

## Facts

- Endpoint: GET https://json-repair.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: 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-13da8a0d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FT0CaLocfy-xzTX_75KbU

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-13da8a0d
```

Example prompt: Can you verify whether john.smith@acme.com is a real, deliverable email — check the syntax, MX records, SPF and DMARC DNS setup, and flag it if it looks like a disposable or role address?

## When to prefer this

Choose this endpoint when you need a single API call that combines email syntax checking, disposable/burner detection, role account flagging, and live DNS MX/SPF/DMARC record validation — especially in B2B lead enrichment, CRM hygiene, sign-up fraud prevention, or cold outreach compliance workflows. Prefer this over basic regex-only validators when live DNS verification is required.

## Known failure modes

- Missing or invalid 'email' parameter returns an error
- DNS lookup timeout if the domain's nameservers are unresponsive
- Domain has no MX records (email undeliverable)
- SPF or DMARC records absent (returned as not configured, not an API error)
- Disposable provider list may lag new burner domains
- Payment required (HTTP 402) if x402 USDC micropayment not provided

## 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/spf-dmarc-auditor)

## Output

Returns a structured JSON object indicating email syntax validity, whether the domain belongs to a known disposable/burner provider, whether the local part is a role account (e.g. admin@, noreply@), live MX record resolution results, SPF record presence and content, and DMARC policy details — enabling a full deliverability and trustworthiness assessment.

## 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-13da8a0d/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)