> ## Documentation Index
> Fetch the complete documentation index at: https://upstash.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# Backendless Coin Price List with GraphQL API, Serverless Redis and Next.JS
In this tutorial, we will develop a simple coin price list using GraphQL API of
Upstash. You can call the application `backendless` because we will access the
database directly from the client (javascript). See the
[code](https://github.com/upstash/examples/tree/master/examples/coin-price-list).
## Motivation
We want to give a use case where you can use the GraphQL API without any backend
code. The use case is publicly available read only data for web applications
where you need low latency. The data is updated frequently by another backend
application, you want your users to see the last updated data. Examples:
Leaderboards, news list, blog list, product list, top N items in the homepages.
### `1` Project Setup:
Create a Next application: `npx create-next-app`.
Install Apollo GraphQL client: `npm i @apollo/client`
### `2` Database Setup
If you do not have one, create a database following this
[guide](../overall/getstarted). Connect your database via Redis CLI and run:
```shell theme={"system"}
rpush coins '{ "name" : "Bitcoin", "price": 56819, "image": "https://s2.coinmarketcap.com/static/img/coins/64x64/1.png"}' '{ "name" : "Ethereum", "price": 2130, "image": "https://s2.coinmarketcap.com/static/img/coins/64x64/1027.png"}' '{ "name" : "Cardano", "price": 1.2, "image": "https://s2.coinmarketcap.com/static/img/coins/64x64/2010.png"}' '{ "name" : "Polkadot", "price": 35.96, "image": "https://s2.coinmarketcap.com/static/img/coins/64x64/6636.png"}' '{ "name" : "Stellar", "price": 0.506, "image": "https://s2.coinmarketcap.com/static/img/coins/64x64/512.png"}'
```
### `3` Code
In the Upstash console, copy the read only access key in your API configuration
page (GraphQL Explorer > Configure API). In the `_app.js` create the Apollo
client and replace the your access key as below:
You need to use Read Only Access Key, because the key will be accessible
publicly.
```javascript theme={"system"}
import "../styles/globals.css";
import {
ApolloClient,
ApolloProvider,
createHttpLink,
InMemoryCache,
} from "@apollo/client";
const link = createHttpLink({
uri: "https://graphql-us-east-1.upstash.io/",
headers: {
Authorization: "Bearer YOUR_ACCESS_TOKEN",
},
});
const client = new ApolloClient({
uri: "https://graphql-us-east-1.upstash.io/",
cache: new InMemoryCache(),
link,
});
function MyApp({ Component, pageProps }) {
return (
{" "}
);
}
export default MyApp;
```
Edit `index.js` as below:
```javascript theme={"system"}
import Head from "next/head";
import styles from "../styles/Home.module.css";
import { gql, useQuery } from "@apollo/client";
import React from "react";
const GET_COIN_LIST = gql`
query {
redisLRange(key: "coins", start: 0, stop: 6)
}
`;
export default function Home() {
let coins = [];
const { loading, error, data } = useQuery(GET_COIN_LIST);
if (!loading && !error) {
for (let x of data.redisLRange) {
let dd = JSON.parse(x);
coins.push(dd);
}
}
return (
Create Next App
Coin Price List
{!loading ? (
coins.map((item, ind) => (
{item.name}
${item.price}
))
) : (
)}
);
}
```
### `4` Run
Run your application locally: `npm run dev`
### `5` Live!
Go to [http://localhost:3000/](http://localhost:3000/) 🎉
## Motivation
We want to give a use case where you can use the GraphQL API without any backend
code. The use case is publicly available read only data for web applications
where you need low latency. The data is updated frequently by another backend
application, you want your users to see the last updated data. Examples:
Leaderboards, news list, blog list, product list, top N items in the homepages.
### `1` Project Setup:
Create a Next application: `npx create-next-app`.
Install Apollo GraphQL client: `npm i @apollo/client`
### `2` Database Setup
If you do not have one, create a database following this
[guide](../overall/getstarted). Connect your database via Redis CLI and run:
```shell theme={"system"}
rpush coins '{ "name" : "Bitcoin", "price": 56819, "image": "https://s2.coinmarketcap.com/static/img/coins/64x64/1.png"}' '{ "name" : "Ethereum", "price": 2130, "image": "https://s2.coinmarketcap.com/static/img/coins/64x64/1027.png"}' '{ "name" : "Cardano", "price": 1.2, "image": "https://s2.coinmarketcap.com/static/img/coins/64x64/2010.png"}' '{ "name" : "Polkadot", "price": 35.96, "image": "https://s2.coinmarketcap.com/static/img/coins/64x64/6636.png"}' '{ "name" : "Stellar", "price": 0.506, "image": "https://s2.coinmarketcap.com/static/img/coins/64x64/512.png"}'
```
### `3` Code
In the Upstash console, copy the read only access key in your API configuration
page (GraphQL Explorer > Configure API). In the `_app.js` create the Apollo
client and replace the your access key as below: