# B2A Email Deliverability, MX, SPF & DMARC Verifier

> B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from mcp-compiler.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 checks.

## Facts

- Endpoint: GET https://mcp-compiler.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: mcp-compiler.agentdiet.dev
- Website: https://mcp-compiler.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mcp-compiler-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-b017fde1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LwNSqAqKKy0Kk8-5yX6Lo

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 mcp-compiler-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-b017fde1
```

Example prompt: Can you check whether john.doe@acmecorp.com is a real, deliverable email address — verify its syntax, confirm there are live MX records for acmecorp.com, and flag it if it's a disposable or role-based account?

## When to prefer this

Choose this endpoint when you need a comprehensive, real-time email health check combining syntax validation, DNS MX/SPF/DMARC lookups, disposable provider detection, and role account flagging in a single call — particularly useful for lead enrichment pipelines, signup form validation, and pre-campaign list scrubbing where bounce prevention and data quality matter.

## Known failure modes

- Invalid or missing email parameter returns a validation error
- Domain with no MX records returns non-deliverable status
- DNS lookup timeout for slow or unresponsive nameservers
- Payment required (HTTP 402) if x402 USDC payment header is missing or insufficient
- Malformed email string may return syntax error rather than DNS lookup
- Rate limiting or quota exhaustion if many calls are made rapidly

## 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://mcp-compiler.agentdiet.dev/v1/email)

## Output

Returns a structured object indicating email syntax validity, whether the domain has live MX records (deliverability), SPF record presence and content, DMARC record presence and policy, whether the provider is a known disposable/burner service, and whether the address is a role account (e.g. info@, admin@, noreply@).

## 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/mcp-compiler-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-b017fde1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-compiler.agentdiet.dev](https://www.zero.xyz/host/mcp-compiler.agentdiet.dev/llms.txt)