# GET /email-check: $0.002 per call

Check an email address before you use it: syntax, whether its domain has mail servers (MX, with null-MX and A-record fallback), disposable/throwaway providers, role accounts (info@, support@), free providers, and typo suggestions (gmial.com → gmail.com). Pass ?email=someone@example.com. Does not contact the mailbox.

- **Price:** $0.002 in USDC, the same on Base, Solana, Polygon, Arbitrum. Failed calls are never charged.
- **Free trial:** yes, 20 free calls a day from Claude, Cursor or any MCP client ([set-up](/mcp/setup)).
- **Answers cached for:** 1 hour(s)
- **Data sources:** Cloudflare DNS (free)
- **Lane:** Utilities ([OpenAPI](/openapi/utilities.json))
- **Live health:** [status page](/status)

## Free sample

See an answer for the demo input first, free (no payment, 10 a minute): [https://aayatai.com/sample/email-check](/sample/email-check). It is a stored real answer when we have one, otherwise an example marked `"kind": "illustrative"`.

```bash
curl "https://aayatai.com/sample/email-check"
```

## 1. See the price (free)

Call it without paying: you get `402 Payment Required` and a `PAYMENT-REQUIRED` header with the exact price and where to pay.

```bash
curl -i "https://aayatai.com/email-check?email=info%40gmial.com"
```

## 2. Pay and call (TypeScript)

```bash
npm install @x402/fetch @x402/evm viem
```

```ts
import { wrapFetchWithPaymentFromConfig } from "@x402/fetch";
import { ExactEvmScheme } from "@x402/evm";
import { privateKeyToAccount } from "viem/accounts";

// A wallet used only by your agent, holding a little USDC on Base.
const account = privateKeyToAccount(process.env.WALLET_PRIVATE_KEY as `0x${string}`);
const pay = wrapFetchWithPaymentFromConfig(fetch, {
  schemes: [{ network: "eip155:8453", client: new ExactEvmScheme(account) }],
});

const res = await pay("https://aayatai.com/email-check?email=info%40gmial.com");
console.log(await res.json());
```

## 3. Or as an MCP tool

```ts
// MCP server: https://aayatai.com/mcp (Streamable HTTP). With the x402 MCP client (see /start):
const result = await client.callTool("email-check", {"email":"info@gmial.com"});
```

## Inputs

- `email` **(required)** (string): Email address to check.

Bad inputs are rejected with HTTP 400 before any payment is asked for.

## Example answer

```json
{
  "email": "info@gmial.com",
  "valid": false,
  "reason": "The domain has no mail servers.",
  "syntaxValid": true,
  "domain": "gmial.com",
  "mx": [],
  "acceptsMail": false,
  "disposable": false,
  "roleAccount": true,
  "freeProvider": false,
  "suggestion": "info@gmail.com"
}
```

## Related

- [GET /dns](/services/dns) ($0.001): Look up DNS records for any domain: A, AAAA, CNAME, MX, NS, TXT, SOA, CAA, SRV, PTR, DS, DNSKEY, HTTPS, or ALL common types at once.
- [GET /rdap](/services/rdap) ($0.002): Domain registration lookup (RDAP, the modern WHOIS): registrar, abuse contact, created/updated/expiry dates, domain age, days until expiry, status codes, name s
- [GET /qr](/services/qr) ($0.001): Turn text or a link into a QR code.

New here? [Getting started in 60 seconds](/start). All services: [Aayat AI](/).