# 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, and DMARC record presence.

## Facts

- Endpoint: GET https://github-audit.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: 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-ad5cdc26
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QFelzwG1bwjEg43JXwLaR

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-ad5cdc26
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email — specifically whether the domain has valid MX records, is it from a disposable provider, and whether SPF and DMARC are configured?

## When to prefer this

Choose this endpoint when you need a comprehensive single-call email check that covers syntax, disposable provider detection, role account flagging, and live DNS MX/SPF/DMARC verification together — especially in B2A or agent-driven workflows where micropayment via x402 is already supported and you need actionable deliverability signals before sending outreach or onboarding a user.

## Known failure modes

- Missing or malformed email parameter returns a validation error
- DNS lookup timeouts for domains with slow or unreachable nameservers
- False negatives for newly created disposable domains not yet in blocklists
- Domains with no MX records flagged as undeliverable even if they accept mail via other means
- Rate limiting or HTTP 402 payment required if micropayment not fulfilled

## 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/email-check)

## Output

Returns a structured object indicating whether the email passed syntax validation, whether the domain is from a known disposable/burner provider, whether it is a role account (e.g. admin@, info@), and live DNS lookup results for MX, SPF, and DMARC records — giving a composite deliverability 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/github-audit-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-ad5cdc26/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)