How to Build a DexScreener Clone

Introduction

In this tutorial, you’ll learn how to build a DEX token screener similar to DexScreener using the Moralis API. The screener will display top tokens by volume with real-time prices, market cap, and price changes. We’ll use the following Moralis API endpoint:

Token Search - Search and discover tokens by various metrics

Prerequisites

Node.js v18+ installed
A Moralis API key (get one free)

Step 1: Set Up Your Project

Create a new directory for your project and initialize it:

mkdir dex-screener && cd dex-screener
npm init -y

Step 2: Create the Script

Create a file called index.js and add the following code:

// index.js
const API_KEY = 'YOUR_API_KEY';

async function getTopTokens() {
  const response = await fetch(
    'https://deep-index.moralis.io/api/v2.2/discovery/tokens',
    {
      method: 'POST',
      headers: {
        'X-API-Key': API_KEY,
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({
        chains: ['eth'],
        filters: [
          { metric: 'marketCap', gt: 100000 },
          { metric: 'volumeUsd', timeFrame: 'oneDay', gt: 10000 },
          { metric: 'securityScore', gt: 70 }
        ],
        sortBy: {
          metric: 'volumeUsd',
          timeFrame: 'oneDay',
          type: 'DESC'
        },
        limit: 20
      }),
    }
  );

  const data = await response.json();
  console.log(JSON.stringify(data, null, 2));
}

getTopTokens();

Replace YOUR_API_KEY with your actual Moralis API key.

Step 3: Run the Script

Execute the script to get the top tokens:

node index.js

Example Response

{
  "result": [
    {
      "tokenAddress": "0xdac17f958d2ee523a2206206994597c13d831ec7",
      "chain": "eth",
      "name": "Tether USD",
      "symbol": "USDT",
      "logo": "https://cdn.moralis.io/eth/0xdac17f958d2ee523a2206206994597c13d831ec7.png",
      "priceUsd": "1.00",
      "marketCap": "83000000000",
      "volumeUsd": {
        "oneDay": "25000000000"
      },
      "pricePercentChange": {
        "oneDay": "0.01"
      },
      "securityScore": 85,
      "holders": 4500000,
      "createdAt": "2017-11-28T00:00:00.000Z"
    }
  ],
  "cursor": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."
}

Understanding the Response

Field	Description
`tokenAddress`	Contract address of the token
`chain`	Blockchain the token is on
`name`	Token name
`symbol`	Token ticker symbol
`logo`	URL to token logo image
`priceUsd`	Current price in USD
`marketCap`	Total market capitalization
`volumeUsd.oneDay`	24-hour trading volume in USD
`pricePercentChange.oneDay`	24-hour price change percentage
`securityScore`	Token security score (0-100)
`holders`	Number of token holders
`createdAt`	When the token was created

Next Steps

Get Token Price - Price data
Get OHLC Data - Historical prices
Get Token Pairs - Liquidity data
API Reference - Full API documentation

Introduction

Getting Started

Pricing & Resources

Tutorials & Guides

How to Build a DexScreener Clone

Introduction

Prerequisites

Step 1: Set Up Your Project

Step 2: Create the Script

Step 3: Run the Script

Example Response

Understanding the Response

Next Steps

​Introduction

​Prerequisites

​Step 1: Set Up Your Project

​Step 2: Create the Script

​Step 3: Run the Script

​Example Response

​Understanding the Response

​Next Steps

Introduction

Prerequisites

Step 1: Set Up Your Project

Step 2: Create the Script

Step 3: Run the Script

Example Response

Understanding the Response

Next Steps