> Fetch clean Markdown by appending `.md` to any page URL under https://signalwire.com/docs or requesting it with the HTTP header `Accept: text/markdown`. The root index at https://signalwire.com/docs/llms.txt lists the available documentation indexes.

# MFA

> Multi-factor authentication via SMS and voice.

[restclient]: /docs/server-sdks/reference/typescript/rest/client

[sms]: /docs/server-sdks/reference/typescript/rest/mfa/sms

[call]: /docs/server-sdks/reference/typescript/rest/mfa/call

[verify]: /docs/server-sdks/reference/typescript/rest/mfa/verify

Send and verify multi-factor authentication (MFA) codes via SMS or voice call.
The typical flow is: request a code with `sms()` or `call()`, then confirm it
with `verify()`.

Access via `client.mfa` on a [`RestClient`][restclient] instance.

```typescript {9}
import { RestClient } from "@signalwire/sdk";

const client = new RestClient({
  project: "your-project-id",
  token: "your-api-token",
  host: "your-space.signalwire.com"
});

const request = await client.mfa.sms({ to: "+15551234567", from: "+15559876543" });
console.log(request.id);
```

## **Methods**

#### [sms](/docs/server-sdks/reference/typescript/rest/mfa/sms)

Send an MFA verification code via SMS.

#### [call](/docs/server-sdks/reference/typescript/rest/mfa/call)

Send an MFA verification code via voice call.

#### [verify](/docs/server-sdks/reference/typescript/rest/mfa/verify)

Verify an MFA code submitted by the user.

> Multi-factor authentication via SMS and voice.

## Docs

- [call](https://signalwire.com/docs/server-sdks/reference/typescript/rest/mfa/call.md): Send an MFA verification code via voice call.
- [sms](https://signalwire.com/docs/server-sdks/reference/typescript/rest/mfa/sms.md): Send an MFA verification code via SMS.
- [verify](https://signalwire.com/docs/server-sdks/reference/typescript/rest/mfa/verify.md): Verify an MFA code submitted by the user.