# x402-farm Email Validator

> x402-farm Email Validator is a paid API for AI agents from x402-farm.vercel.app, paid per call via x402, $0.005/call, status down (last checked 2026-09-15).

Validates an email address by checking syntax correctness and domain MX record existence, without sending any email.

## Facts

- Endpoint: GET https://x402-farm.vercel.app/v1/email/validate
- Price: $0.005/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-farm-email-validator-78436339
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_77JR3eEH_-qHXRqqBXPHB

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 x402-farm-email-validator-78436339
```

Example prompt: Can you check if the email address john.doe@example.com is valid — both the format and whether the domain actually accepts mail?

## When to prefer this

Choose this endpoint when you need lightweight, no-side-effect email validation that checks both syntax and domain-level deliverability (MX records) without sending a probe email. Ideal for form validation, lead enrichment, or list cleaning where you want a fast, cheap per-call check ($0.005 USDC) with no account setup required. Prefer over full deliverability services when you don't need SMTP-level verification or inbox existence checks.

## Known failure modes

- Missing or empty email query parameter returns an error
- Malformed query string (e.g. missing '?email=') may cause a bad request
- MX lookup may time out for slow or unresponsive DNS servers
- Payment not included or invalid returns HTTP 402 requiring USDC payment on Base
- Disposable or newly registered domains may have inconsistent MX records affecting result accuracy

## How this service works

Pay-per-call APIs for AI agents — x402 protocol, USDC on Base, no account needed.

## Output

Returns a validation result indicating whether the email address passes syntax checks and whether the domain has valid MX records configured, without ever sending an email or contacting the recipient.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "mx": "gmail-smtp-in.l.google.com",
  "email": "test@gmail.com",
  "valid": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-farm-email-validator-78436339/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-farm.vercel.app](https://www.zero.xyz/host/x402-farm.vercel.app/llms.txt)