# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from github-audit.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/DMARC record verification.

## Facts

- Endpoint: GET https://github-audit.agentdiet.dev/v1/mx-deliverability-verifier?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: github-audit.agentdiet.dev
- Website: https://github-audit.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/github-audit-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-bfc0fbc5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CL7OVUTfTPN2baiHG-gol

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 github-audit-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-bfc0fbc5
```

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

## When to prefer this

Choose this endpoint when you need a comprehensive, single-call email validation covering syntax, DNS infrastructure (MX/SPF/DMARC), disposable provider detection, and role account flagging — especially in agentic or automated pipelines that require micropayment-native (x402) API access. Prefer this over basic regex-only validators when deliverability confidence and fraud prevention are important, or when you need live DNS verification rather than cached data.

## Known failure modes

- Invalid or malformed email input returns a syntax error
- Domain with no DNS records returns MX lookup failure
- Temporary DNS resolution failures may return inconclusive deliverability status
- Payment failure (HTTP 402) if USDC micropayment is not provided
- Unknown or very new domains may have incomplete SPF/DMARC data

## 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://github-audit.agentdiet.dev/v1/mx-deliverability-verifier)

## Output

Returns a structured object indicating email syntax validity, whether the provider is disposable or a known burner service, whether the address appears to be a role account (e.g. info@, admin@), and live DNS lookup results for MX records (mail servers), SPF policy, and DMARC policy for the domain — allowing the caller to assess full email deliverability and legitimacy.

## 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/github-audit-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-bfc0fbc5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from github-audit.agentdiet.dev](https://www.zero.xyz/host/github-audit.agentdiet.dev/llms.txt)