---
id: auth-api-sendmobileotp
title: 'sendMobileOTP()'
slug: auth-api-sendmobileotp
custom_edit_url: https://github.com/supabase/supabase/edit/master/spec/supabase_js_v1_legacy.yml
---

import Tabs from '@theme/Tabs'
import TabItem from '@theme/TabItem'

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>

<li className="method-list-item">
  <h4 className="method-list-item-label">
    <span className="method-list-item-label-name">
      options
    </span>
    <span className="method-list-item-label-badge required">
      required
    </span>
    <span className="method-list-item-validation">
      <code>object</code>
    </span>
  </h4>
  <div class="method-list-item-description">

No description provided.

  </div>
  
<ul className="method-list-group">
  <h5 class="method-list-title method-list-title-isChild expanded">Properties</h5>

<li className="method-list-item">
  <h4 className="method-list-item-label">
    <span className="method-list-item-label-name">
      captchaToken
    </span>
    <span className="method-list-item-label-badge false">
      optional
    </span>
    <span className="method-list-item-validation">
      <code>string</code>
    </span>
  </h4>
  <div class="method-list-item-description">

No description provided.

  </div>
  
</li>

<li className="method-list-item">
  <h4 className="method-list-item-label">
    <span className="method-list-item-label-name">
      shouldCreateUser
    </span>
    <span className="method-list-item-label-badge false">
      optional
    </span>
    <span className="method-list-item-validation">
      <code>boolean</code>
    </span>
  </h4>
  <div class="method-list-item-description">

No description provided.

  </div>
  
</li>

</ul>

</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.

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