# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from email-verify.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-23).

Validates an email address for syntax correctness, disposable/burner provider status, role account detection, and live DNS MX, SPF, and DMARC record checks.

## Facts

- Endpoint: POST https://email-verify.agentdiet.dev/api?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: email-verify.agentdiet.dev
- Website: https://email-verify.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/email-verify-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-178e0c6f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SBKi7GYPhr38DLXd4VtfQ

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 email-verify-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-178e0c6f -d '<json body>'
```

Example prompt: Can you verify whether john.doe@example.com is a real, deliverable email — check its syntax, MX records, SPF and DMARC DNS config, and flag it if it's a disposable or role account?

## When to prefer this

Choose this endpoint when you need a comprehensive, all-in-one email validation that combines syntax checking, disposable/burner provider detection, role account flagging, and live DNS MX/SPF/DMARC record verification in a single API call — especially in agent workflows requiring real-time email risk assessment at low cost ($0.005/call) with idempotency support.

## Known failure modes

- Invalid or missing email input returns a validation error
- DNS lookup timeouts may cause MX/SPF/DMARC checks to fail or return incomplete data
- Non-existent domain results in no MX records found
- Malformed email string fails syntax check immediately
- Payment failure via x402 results in 402 response blocking the request
- Rate limits or transient DNS failures may cause intermittent errors

## 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://email-verify.agentdiet.dev/api)

## Output

Returns a structured object indicating: email syntax validity, whether the domain uses a known disposable/burner provider, whether it is a role-based address (e.g. info@, admin@), live MX record presence and values, SPF record existence and content, and DMARC record existence and policy — giving a comprehensive deliverability and risk profile for the address.

## 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/email-verify-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-178e0c6f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from email-verify.agentdiet.dev](https://www.zero.xyz/host/email-verify.agentdiet.dev/llms.txt)