For convenience, Hydrogen includes a local GraphiQL explorer to help you create queries and learn about Shopify's [Storefront API](https://shopify.dev/api/storefront).

## Requirements

Make sure you have the following [environment variables](/docs/storefronts/headless/hydrogen/environments#environment-variables) in place:

- `PUBLIC_STORE_DOMAIN`
- `PUBLIC_STOREFRONT_API_VERSION`
- `PUBLIC_STOREFRONT_API_TOKEN`

## GraphiQL

The GraphiQL interface is available by default when running the Hydrogen CLI in development mode.

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<script type="text/plain" data-language="bash" data-title="npm">
npx shopify hydrogen dev
</script>
<script type="text/plain" data-language="bash" data-title="Yarn">
yarn shopify hydrogen dev
</script>
<script type="text/plain" data-language="bash" data-title="pnpm">
pnpm shopify hydrogen dev
</script>

</div>
</p>


With the development server running, go to `/graphiql` in your browser.

If you're not using the Hydrogen CLI, or want to customize the GraphiQL interface, you can do so by creating a `graphiql` route in your project:

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<script data-option="filename" data-value="Optional route for GraphiQL"></script>

<script type="text/plain" data-language="jsx" data-filename="<root>/app/routes/graphiql.jsx" data-title="JavaScript">
import {graphiqlLoader} from '@shopify/hydrogen';
import {redirect} from '@shopify/remix-oxygen';

export async function loader(args) {
  if (process.env.NODE_ENV === 'development') {
    // Default Hydrogen GraphiQL behavior
    return graphiqlLoader(args);
  }

  return redirect('/');
}
</script>
<script type="text/plain" data-language="tsx" data-filename="<root>/app/routes/graphiql.tsx" data-title="TypeScript">
import {graphiqlLoader} from '@shopify/hydrogen';
import {redirect, type LoaderArgs} from '@shopify/remix-oxygen';

export async function loader(args: LoaderArgs) {
  if (process.env.NODE_ENV === 'development') {
    // Default Hydrogen GraphiQL behavior
    return graphiqlLoader(args);
  }

  return redirect('/');
}
</script>

</div>
</p>


> Note:
> If you’re creating your own `graphiql` route, then make sure it's not available in production. You can use `process.env.NODE_ENV` to enforce tree-shaking.