# App proxy
[App proxies](/docs/apps/online-store/app-proxies) take requests to Shopify links, and redirect them to external links.
The `authenticate.public.appProxy` function validates requests made to app proxies, and returns a context to enable querying Shopify APIs.

> Note: If the store has not installed the app, store-related properties such as `admin` or `storefront` will be `undefined`
### Authenticate and fetch product information

```typescript
import type {LoaderFunctionArgs} from '@remix-run/node';

import {authenticate} from '../shopify.server';

export const loader = async ({request}: LoaderFunctionArgs) => {
  const {storefront, liquid} = await authenticate.public.appProxy(request);

  if (!storefront) {
    return new Response();
  }

  const response = await storefront.graphql(
    `#graphql
    query productTitle {
      products(first: 1) {
        nodes {
          title
        }
      }
    }`,
  );
  const body = await response.json();

  const title = body.data.products.nodes[0].title;

  return liquid(`Found product ${title} from {{shop.name}}`);
};

```


## authenticate.public.appProxy
Authenticates requests coming to the app from Shopify app proxies.
### AuthenticateAppProxy

#### Returns: Promise<
  AppProxyContext | AppProxyContextWithSession<ConfigArg, Resources>
>

#### Params:
- request: Request
export type AuthenticateAppProxy<
  ConfigArg extends AppConfigArg,
  Resources extends ShopifyRestResources = ShopifyRestResources,
> = (
  request: Request,
) => Promise<
  AppProxyContext | AppProxyContextWithSession<ConfigArg, Resources>
>;
### AppProxyContext

### admin
No session is available for the shop that made this request. Therefore no methods for interacting with the GraphQL / REST Admin APIs are available.
### liquid
A utility for creating a Liquid Response.
### session
No session is available for the shop that made this request.

This comes from the session storage which `shopifyApp` uses to store sessions in your database of choice.
### storefront
No session is available for the shop that made this request. Therefore no method for interacting with the Storefront API is available.
### LiquidResponseFunction

#### Returns: Response

#### Params:
- body: string
- initAndOptions: number | (ResponseInit & Options)
export type LiquidResponseFunction = (
  body: string,
  initAndOptions?: number | (ResponseInit & Options),
) => Response;
### Options

### layout
Whether to use the shop's theme layout around the Liquid content.
### AppProxyContextWithSession

### admin
Methods for interacting with the GraphQL / REST Admin APIs for the store that made the request.
### liquid
A utility for creating a Liquid Response.
### session
The session for the shop that made the request.

This comes from the session storage which `shopifyApp` uses to store sessions in your database of choice.

Use this to get shop or user-specific data.
### storefront
Method for interacting with the Shopify Storefront Graphql API for the store that made the request.
### StorefrontContext

### graphql
Method for interacting with the Shopify Storefront GraphQL API

If you're getting incorrect type hints in the Shopify template, follow [these instructions](https://github.com/Shopify/shopify-app-template-remix/tree/main#incorrect-graphql-hints).





### GraphQLClient

#### Returns: interface Promise<T> {
    /**
     * Attaches callbacks for the resolution and/or rejection of the Promise.
     * @param onfulfilled The callback to execute when the Promise is resolved.
     * @param onrejected The callback to execute when the Promise is rejected.
     * @returns A Promise for the completion of which ever callback is executed.
     */
    then<TResult1 = T, TResult2 = never>(onfulfilled?: ((value: T) => TResult1 | PromiseLike<TResult1>) | undefined | null, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | undefined | null): Promise<TResult1 | TResult2>;

    /**
     * Attaches a callback for only the rejection of the Promise.
     * @param onrejected The callback to execute when the Promise is rejected.
     * @returns A Promise for the completion of the callback.
     */
    catch<TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | undefined | null): Promise<T | TResult>;
}, interface Promise<T> {}, Promise: PromiseConstructor, interface Promise<T> {
    readonly [Symbol.toStringTag]: string;
}, interface Promise<T> {
    /**
     * Attaches a callback that is invoked when the Promise is settled (fulfilled or rejected). The
     * resolved value cannot be modified from the callback.
     * @param onfinally The callback to execute when the Promise is settled (fulfilled or rejected).
     * @returns A Promise for the completion of the callback.
     */
    finally(onfinally?: (() => void) | undefined | null): Promise<T>;
}

#### Params:
- query: Operation extends keyof Operations
- options: GraphQLQueryOptions<Operation, Operations>
export type GraphQLClient<Operations extends AllOperations> = <
  Operation extends keyof Operations,
>(
  query: Operation,
  options?: GraphQLQueryOptions<Operation, Operations>,
) => Promise<GraphQLResponse<Operation, Operations>>;
### GraphQLQueryOptions

### apiVersion
The version of the API to use for the request.
### headers
Additional headers to include in the request.
### tries
The total number of times to try the request if it fails.
### variables
The variables to pass to the operation.
## Related
- [Admin API context](/docs/api/shopify-app-remix/apis/admin-api)
- [Storefront API context](/docs/api/shopify-app-remix/apis/storefront-api)
- [Liquid reference](/docs/api/liquid)
## Examples
[App proxies](/docs/apps/online-store/app-proxies) take requests to Shopify links, and redirect them to external links.
The `authenticate.public.appProxy` function validates requests made to app proxies, and returns a context to enable querying Shopify APIs.

> Note: If the store has not installed the app, store-related properties such as `admin` or `storefront` will be `undefined`
### admin

### Interacting with the Admin API

```typescript
import { json } from "@remix-run/node";
import { authenticate } from "../shopify.server";

export async function action({ request }: ActionFunctionArgs) {
  const { admin } = await authenticate.public.appProxy(request);

  const response = await admin.graphql(
    `#graphql
    mutation populateProduct($input: ProductInput!) {
      productCreate(input: $input) {
        product {
          id
        }
      }
    }`,
    {
      variables: {
        input: { title: "Product Name" }
      }
    }
  );

  const productData = await response.json();
  return json({ data: productData.data });
}
```


### liquid

### Rendering liquid content

```typescript
import {authenticate} from "~/shopify.server"

export async function loader({ request }) {
  const {liquid} = await authenticate.public.appProxy(request);

  return liquid("Hello {{shop.name}}");
}
```


### Rendering liquid content without a layout

```typescript
import {authenticate} from "~/shopify.server"

export async function loader({ request }) {
  const {liquid} = await authenticate.public.appProxy(request);

  return liquid(
    "Hello {{shop.name}}",
    { layout: false }
  );
}
```


### Rendering a form in a Liquid response

```typescript
import { redirect } from "@remix-run/node";
import { authenticate } from "~/shopify.server";

export async function loader({ request }) {
  const { liquid } = await authenticate.public.appProxy(request);

  return liquid(`
    &lt;form method="post" action="/apps/proxy/my-action"&gt;
      &lt;input type="text" name="field" /&gt;
      &lt;button type="submit"&gt;Submit&lt;/button&gt;
    &lt;/form&gt;
  `);
}

export async function action({ request }) {
  await authenticate.public.appProxy(request);

  const formData = await request.formData();
  const field = formData.get("field")?.toString();

  // Perform actions here
  if (field) {
    console.log("Field:", field);
  }

  // Return to the form page
  return redirect("/apps/proxy/my-action");
}
```


### session

### Using the session object

```typescript
import { json } from "@remix-run/node";
import { authenticate } from "../shopify.server";
import { getMyAppModelData } from "~/db/model.server";

export const loader = async ({ request }) =&gt; {
  // Get the session for the shop that initiated the request to the app proxy.
  const { session } =
    await authenticate.public.appProxy(request);

  // Use the session data to make to queries to your database or additional requests.
  return json(
    await getMyAppModelData({shop: session.shop})
  );
};
```


### storefront

### Interacting with the Storefront API

```typescript
import { json } from "@remix-run/node";
import { authenticate } from "../shopify.server";

export async function action({ request }: ActionFunctionArgs) {
  const { storefront } = await authenticate.public.appProxy(request);

  const response = await storefront.graphql(
    `#graphql
    query blogIds {
      blogs(first: 10) {
        edges {
          node {
            id
          }
        }
      }
    }`
  );

  return json(await response.json());
}
```