> ## Documentation Index
> Fetch the complete documentation index at: https://docs.corsair.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# API

> API reference for MailboxLayer: every `mailboxlayer.api.*` operation with input and output types.

Every `mailboxlayer.api.*` operation is listed below with parameter shapes and return types from the plugin Zod schemas.

<Info>
  **New to Corsair?** See [API access](/concepts/api), [authentication](/concepts/auth), and [error handling](/concepts/error-handling).
</Info>

## Email

### check

`email.check`

Validate whether an email address is correctly formatted, has valid MX records, and is deliverable via SMTP

**Risk:** `read`

```ts theme={null}
await corsair.mailboxlayer.api.email.check({});
```

**Input**

| Name    | Type      | Required | Description                                                                                           |
| ------- | --------- | -------- | ----------------------------------------------------------------------------------------------------- |
| `email` | `string`  | Yes      | The email address to validate and verify                                                              |
| `smtp`  | `boolean` | No       | Whether to run a real-time SMTP check (default true). Set to false for a faster format/MX-only check. |

**Output**

| Name           | Type      | Required | Description |
| -------------- | --------- | -------- | ----------- |
| `email`        | `string`  | Yes      | —           |
| `did_you_mean` | `string`  | Yes      | —           |
| `user`         | `string`  | Yes      | —           |
| `domain`       | `string`  | Yes      | —           |
| `format_valid` | `boolean` | Yes      | —           |
| `mx_found`     | `boolean` | Yes      | —           |
| `smtp_check`   | `boolean` | Yes      | —           |
| `catch_all`    | `boolean` | No       | —           |
| `role`         | `boolean` | Yes      | —           |
| `disposable`   | `boolean` | Yes      | —           |
| `free`         | `boolean` | Yes      | —           |
| `score`        | `number`  | Yes      | —           |

***