# Local-only, offline mode

To use SDKs in local-only, offline mode, disable server initialization and use a [build-time snapshot](/sdk-reference/build-time-snapshot.md) of your flag logic. This is useful for running unit tests or using Hypertune in isolated, secure, air-gapped environments.

Set the `initDataProvider` option to `null` in your `createSource` options. You can also set `remoteLogging.mode` to `off` to disable sending logs to the remote server:

{% tabs %}
{% tab title="React" %}
{% code title="src/components/AppHypertuneProvider.tsx" %}

```tsx
import { HypertuneProvider } from '../generated/hypertune.react'

export default function AppHypertuneProvider({
  children,
}: {
  children: React.ReactNode
}) {
  return (
    <HypertuneProvider
      createSourceOptions={{
        token: import.meta.env.VITE_HYPERTUNE_TOKEN!,
        initDataProvider: null,
        remoteLogging: { mode: 'off' },
      }}
      rootArgs={{
        context: {
          environment:
            process.env.NODE_ENV === 'development'
              ? 'development'
              : 'production',
          user: {
            id: 'e23cc9a8-0287-40aa-8500-6802df91e56a',
            name: 'Example User',
            email: 'user@example.com',
          },
        },
      }}
    >
      {children}
    </HypertuneProvider>
  )
}
```

{% endcode %}
{% endtab %}

{% tab title="Node.js" %}
{% code title="src/lib/getHypertune.ts" %}

```typescript
import { createSource } from '../generated/hypertune'

const hypertuneSource = createSource({
  token: process.env.HYPERTUNE_TOKEN!,
  initDataProvider: null,
  remoteLogging: { mode: 'off' },
})

export default async function getHypertune() {
  return hypertuneSource.root({
    args: {
      context: {
        environment:
          process.env.NODE_ENV === 'development'
            ? 'development'
            : 'production',
        user: {
          id: 'e23cc9a8-0287-40aa-8500-6802df91e56a',
          name: 'Example User',
          email: 'user@example.com',
        },
      },
    },
  })
}
```

{% endcode %}
{% endtab %}
{% endtabs %}


---

# Agent Instructions: Querying This Documentation

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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.hypertune.com/sdk-reference/local-only-offline-mode.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.