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# Request an API Credential OTP by Email

Request a one-time password (OTP) to create an API credential for an existing K4K3RU account. The OTP is sent to the email address associated with the account.

## Endpoint

| Property       | Value                                     |
| -------------- | ----------------------------------------- |
| URL            | `https://api.k4k3ru.com/`                 |
| HTTP method    | `POST`                                    |
| RPC method     | `AccountAPI.RequestCredentialCreationOTP` |
| Authentication | Not required                              |

## Request

### Request Body

This method uses the common [JSON-RPC request envelope](/k4k3ru-docs/api/json-rpc.md#request-envelope). Set `method` to `AccountAPI.RequestCredentialCreationOTP`.

### Params Fields

The request envelope's `params` object accepts:

| Field   | Type   | Required | Description                                       |
| ------- | ------ | -------- | ------------------------------------------------- |
| `email` | string | Yes      | Email address associated with the K4K3RU account. |

### Example Request

```bash
curl --request POST 'https://api.k4k3ru.com/' \
  --header 'Content-Type: application/json' \
  --data '{
    "id": "1",
    "method": "AccountAPI.RequestCredentialCreationOTP",
    "params": {
      "email": "alex@example.com"
    }
  }'
```

## Response

### Response Body

Successful requests use the common [JSON-RPC success response envelope](/k4k3ru-docs/api/json-rpc.md#success-response-envelope). Failed requests use the common [JSON-RPC error response envelope](/k4k3ru-docs/api/json-rpc.md#error-response-envelope).

### Result Fields

| Field       | Type   | Description                                                                                 |
| ----------- | ------ | ------------------------------------------------------------------------------------------- |
| `purpose`   | string | Purpose assigned to the OTP. For this method, the value is `account.api.create_credential`. |
| `email`     | string | Email address supplied in the request.                                                      |
| `expiresAt` | string | Time at which the OTP expires, formatted as an RFC 3339 timestamp.                          |

### Errors

| Code                | When it occurs                                                                                                                   |
| ------------------- | -------------------------------------------------------------------------------------------------------------------------------- |
| `invalid_parameter` | The `params` object is invalid, no email address is provided, or the email address is not associated with an account credential. |
| `unexpected`        | The request cannot be completed because of an unexpected processing, storage, or email-delivery failure.                         |

### Example Success Response

```json
{
  "id": "1",
  "result": {
    "purpose": "account.api.create_credential",
    "email": "alex@example.com",
    "expiresAt": "2026-08-08T13:12:59Z"
  }
}
```

The `expiresAt` value shown above is an example. Use the value returned by the API for the actual expiration time.

### Example Error Response

```json
{
  "id": "1",
  "error": {
    "code": "invalid_parameter"
  }
}
```


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