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

# initiateMfaVerification

```ts theme={null}
function initiateMfaVerification(options: InitiateMfaVerificationOptions): Promise<void>;
```

Initiates an MFA verification flow for operations requiring MFA.
This endpoint should be called when a user attempts a sensitive operation
(like transaction signing) but doesn't have a valid MFA-verified session.

For TOTP, this prepares a verification session.
For SMS, this sends a 6-digit OTP code to the user's enrolled phone number.

## Parameters

| Parameter | Type                                                                                                                          | Description                                  |
| --------- | ----------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------- |
| `options` | [`InitiateMfaVerificationOptions`](/sdks/cdp-sdks-v2/frontend/@coinbase/cdp-core/Type-Aliases/InitiateMfaVerificationOptions) | The options for initiating MFA verification. |

## Returns

`Promise`\<`void`>

A promise that resolves if MFA initiation is successful.

## Example

```typescript lines theme={null}
// TOTP verification
await initiateMfaVerification({ mfaMethod: "totp" });
// Prompt user for code from authenticator app

// SMS verification
await initiateMfaVerification({ mfaMethod: "sms" });
// SMS sent to user's phone - prompt for code
```