> Deprecated:
> Product subscription app extensions won't be supported as of December 3, 2025. You should migrate existing product subscription app extensions to [purchase options extensions](/docs/apps/build/purchase-options/purchase-options-extensions).


Get a fresh session token for communication with your app's backend service.
Calls to Shopify APIs must be made by your app’s backend service.

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<script type="text/plain" data-language="ts" data-title="JavaScript">
RAW_MD_CONTENT
import {extend} from '@shopify/admin-ui-extensions';

extend('Admin::Product::SubscriptionPlan::Add', (root, api) => {
  const {sessionToken} = api;
  const text = root.createText();

  sessionToken.getSessionToken().then((newToken) => {
    text.updateText(newToken);
  });

  root.appendChild(text);
  root.mount();
});


END_RAW_MD_CONTENT</script>
<script type="text/plain" data-language="tsx" data-title="React">
RAW_MD_CONTENT
import React, {useState, useEffect} from 'react';
import {
  extend,
  render,
  useSessionToken,
  TextField,
} from '@shopify/admin-ui-extensions-react';

function App() {
  const {getSessionToken} = useSessionToken();
  const [token, setToken] = useState('');

  useEffect(() => {
    getSessionToken().then((newToken) => {
      setToken(newToken);
    });
  }, []);

  return <TextField label="Session Token" value={token} disabled />;
}

extend(
  'Admin::Product::SubscriptionPlan::Add',
  render(() => <App />),
);


END_RAW_MD_CONTENT</script>

</div>
</p>


## Props
optional = ?
<a name="SessionToken"></a>


| Name | Type | Description |
| --- | --- | --- |
| getSessionToken | <code>() => Promise<<wbr>string &#124; UndefinedType<wbr>></code> | Get a fresh session token.  |