---
id: auth-api-sendmobileotp
title: "sendMobileOTP()"
slug: auth-api-sendmobileotp
custom_edit_url: https://github.com/supabase/supabase/edit/master/web/spec/supabase.yml
---

import Tabs from '@theme/Tabs';
import TabsPanel from '@theme/TabsPanel';

Sends a mobile OTP via SMS. Will register the account if it doesn't already exist



## Parameters


<ul className="method-list-group">
  
<li className="method-list-item">
  <h4 className="method-list-item-label">
    <span className="method-list-item-label-name">
      phone
    </span>
    <span className="method-list-item-label-badge required">
      required
    </span>
    <span className="method-list-item-validation">
      <code>string</code>
    </span>
  </h4>
  <div class="method-list-item-description">

The user's phone number WITH international prefix

  </div>
  
</li>

</ul>


## Notes

- Requires a `service_role` key.
- This function should only be called on a server. Never expose your `service_role` key in the browser.










## Examples

### Basic example.



<Tabs
  defaultActiveId="js"
  groupId="reference/supabase-js"
  values={[{ label: 'JavaScript', value: 'js' }]}>

<TabsPanel id="js" label="js">

```js
const { data: user, error } = await supabase.auth
  .api
  .sendMobileOTP('12345879')
```


</TabsPanel>

</Tabs>