# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from domain-osint.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 health.

## Facts

- Endpoint: GET https://domain-osint.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: domain-osint.agentdiet.dev
- Website: https://domain-osint.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/domain-osint-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-2637093e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__oKsbgZye4AsR9Gz5kNO9

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 domain-osint-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-2637093e
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email address — specifically whether it passes syntax checks, isn't from a disposable provider, and has valid MX, SPF, and DMARC records?

## When to prefer this

Choose this endpoint when you need a comprehensive, live email validation that goes beyond syntax checking — specifically when you need real-time DNS MX, SPF, and DMARC verification combined with disposable provider and role account detection in a single API call. It is ideal for lead enrichment pipelines, user registration screening, and email deliverability auditing where you need actionable signals rather than just format validation.

## Known failure modes

- Missing or malformed email parameter returns a 400-level error
- DNS lookup timeouts for domains with slow or unresponsive nameservers may cause delays or incomplete results
- Disposable provider detection depends on a maintained blocklist and may miss newly created throwaway services
- Payment failure or missing x402 credentials returns a 402 Payment Required response
- Very new domains may have no MX/SPF/DMARC records yet, returning false negatives on deliverability

## 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://domain-osint.agentdiet.dev/v1/email-check)

## Output

Returns a structured object indicating whether the email address is syntactically valid, whether the domain is associated with a known disposable/burner provider, whether it is a role-based address (e.g. admin@, info@), and live DNS lookup results for MX records (confirming mail servers exist), SPF records (sender policy), and DMARC records (anti-spoofing policy).

## 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/domain-osint-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-2637093e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from domain-osint.agentdiet.dev](https://www.zero.xyz/host/domain-osint.agentdiet.dev/llms.txt)