# Apollo Hooks

It is now time to get some real data from the server. Remember `Health`? Let's display the result on a page using [Apollo Hooks](https://www.apollographql.com/docs/tutorial/queries/#the-usequery-hook).

{% code title="\~/packages/web" %}

```
$ yarn add apollo-boost react-apollo apollo-client graphql apollo-utilities apollo-cache apollo-link
```

{% endcode %}

Update `App.tsx` to use `ApolloProvider`:

```typescript
import React from "react";
import ApolloClient from "apollo-boost";
import { ApolloProvider } from "react-apollo";
import "./App.css";
import { LinksPage } from "./pages/links";

const client = new ApolloClient({ uri: "/graphql" });

const App: React.FC = () => {
  return (
    <ApolloProvider client={client}>
      <div className="App">
        <LinksPage />
      </div>
    </ApolloProvider>
  );
};

export default App;
```

To tell the development server to proxy any unknown requests to your API server in development, add a `proxy` field to your `package.json:`

```
"proxy": "http://localhost:8080"
```

{% hint style="info" %}
Make sure the server is running.&#x20;
{% endhint %}

Update `LinksPages` to query `Health`:

```typescript
import * as React from "react";
import { LinkList } from "./LinkList";
import { Header } from "../../components/Header";
import { useQuery } from "react-apollo";
import { gql } from "apollo-boost";

const getData = () => [{ id: "1", uri: "http://mock", userId: "userid" }];

export const LinksPage = () => {
  const { data, loading, error } = useQuery(gql`
    {
      health {
        ok
      }
    }
  `);
  if (loading) {
    return <div>Loading...</div>;
  }
  if (error) {
    return <div>Oops... Something wrong happened. Try again later.</div>;
  }
  return (
    <div>
      <Header />
      <div>Health {data.health.ok}</div>
      <LinkList links={getData()} />
    </div>
  );
};

export default LinksPage;
```

We can send request to our GrapqhQL API. Now we need to add user authentication.

{% hint style="info" %}
[`apollo-hooks`](https://github.com/florianherrengt/book-code/tree/apollo-hooks) branch available on GitHub.
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

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

```
GET https://tutorial.specian.co.uk/frontend/apollo-hooks.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.