# Email Validation — Syntax, MX, and Disposable Domain Check

> Email Validation — Syntax, MX, and Disposable Domain Check is a paid API for AI agents from mcpfax-utility.bowling-anthony.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Validates an email address by checking syntax correctness, live MX record deliverability, and whether the domain is a known disposable/throwaway provider.

## Facts

- Endpoint: GET https://mcpfax-utility.bowling-anthony.workers.dev/v1/validate-email
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/email-validation-syntax-mx-and-disposable-domain-check-a6ae1997
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rvgFcC-gZBQ2pSHD0BxS2

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-validation-syntax-mx-and-disposable-domain-check-a6ae1997
```

Example prompt: Can you check whether 'john.doe@tempmail.com' is a valid, deliverable email address, and tell me if it's from a disposable domain?

## When to prefer this

Choose this endpoint when you need a fast, multi-layered email check combining syntax, live DNS/MX deliverability, and disposable-domain detection in a single call — especially for registration flows, lead enrichment, or outreach list hygiene. Prefer it over simple regex-only validators when you need to know if the domain can actually receive mail, or when filtering out throwaway accounts is important.

## Known failure modes

- Invalid or malformed email input returns a syntax error immediately without MX lookup
- Domain has no MX records — email structurally valid but undeliverable
- MX lookup timeout if the domain's DNS is slow or unresponsive
- Domain is valid but not in the disposable-domain list, potentially missing newer throwaway services
- Network issues on the worker may return 5xx errors

## How this service works

Email validation — Syntax check + live MX/deliverability + disposable-domain flag.

## Output

Returns a structured result indicating whether the email passes syntax validation, whether the domain has live MX records (confirming it can receive mail), and whether the domain is flagged as a disposable/throwaway provider — giving a clear deliverability verdict for each check.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/email-validation-syntax-mx-and-disposable-domain-check-a6ae1997/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcpfax-utility.bowling-anthony.workers.dev](https://www.zero.xyz/host/mcpfax-utility.bowling-anthony.workers.dev/llms.txt)