# 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 verification.

## Facts

- Endpoint: GET https://domain-osint.agentdiet.dev/v1/email?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-78659ee3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2XEIDPO1hZCuyQEPOa4b4

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-78659ee3
```

Example prompt: Can you check whether john.smith@acmecorp.io is a real, deliverable email — specifically whether it passes syntax checks, has working MX records, and isn't from a disposable or role-based account?

## When to prefer this

Choose this endpoint when you need a comprehensive, single-call email validation that combines syntax checking, disposable provider detection, role account flagging, and live DNS verification of MX, SPF, and DMARC records — especially in B2B lead enrichment, signup fraud prevention, or outreach quality assurance workflows where deliverability and security posture both matter.

## Known failure modes

- Invalid or malformed email format returns a syntax error response
- Domain has no MX records, indicating the address is undeliverable
- DNS lookup timeout or failure for live record resolution
- Rate limiting or payment failure via x402 micropayment protocol
- Domain exists but has no SPF or DMARC records, flagged as misconfigured

## 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)

## Output

Returns a structured object indicating email syntax validity, whether the provider is a known disposable/burner service, whether the local part is a role account (e.g. admin, noreply), and live DNS lookup results for MX records (deliverability), SPF record presence/content, and DMARC record presence/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-78659ee3/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)