For many development teams, accessing and parsing on-chain NFT data can be a challenge. Each NFT has unique on-chain information and metadata stored in blockchain blocks and off-chain servers. Obtaining detailed information for all NFTs and filtering and analyzing them can be highly difficult. The sheer number and variety of NFTs, coupled with their dispersion across different blockchains, require a significant amount of time and effort to parse and clean the data.NFT data platforms provide a simple and effective solution through NFT APIs. With an NFT API interface, developers can easily access on-chain NFT data and perform analysis, processing, statistics, and visualization. This approach not only saves time and effort but also improves development efficiency and the accuracy of data analysis. By leveraging these APIs, developers can effortlessly build their own NFT marketplaces or other NFT-related applications.<img src="https://images.mirror-media.xyz/publication-images/CzOkxyxMHptoVbr-QYDQQ.png?height&#61;1522&amp;width&#61;2512" />As a leading global NFT infrastructure service provider, NFTScan is committed to offering secure and stable NFT data services to Web3 developers and next-generation fintech companies. Among these services, NFT API is one of the core offerings introduced by NFTScan. It aims to provide developers with multi-chain NFT data services, enabling them to access and display data in a consistent and unified manner. This saves time and reduces the costs of development and integration, making it easier and more convenient to build NFT-focused products and applications.Building an NFT marketplace involves a significant amount of work and complexity. It includes tasks such as setting up a blockchain full node, processing massive amounts of data, filtering and retrieving NFT data, handling data discrepancies between different projects, and managing inconsistent storage methods. This process requires a considerable amount of time and effort, as developers often have to deal with various data formats and interfaces. NFTScan simplifies this process by standardizing the data, eliminating the need for developers to set up nodes and parse the data themselves. With NFTScan, developers can easily access and process NFT data without worrying about which NFT project or network the data comes from. This article will guide you on how to utilize the NFTScan NFT API to construct an NFT marketplace.<h3 id="step-1-register-for-an-nftscan-developer-account">Step 1: Register for an NFTScan developer account</h3>Before starting to use the NFTScan API, you need to visit the developer website and create an account.Go to the official NFTScan website at <a href="https://developer.nftscan.com/user/signup" rel="noopener noreferrer nofollow">https://developer.nftscan.com/user/signup</a> and click on the &#34;Sign Up&#34; button for the NFTScan API registration.<img src="https://images.mirror-media.xyz/publication-images/zSr-i2Y86Gub6Wub8mCoY.png?height&#61;637&amp;width&#61;1080" />Once logged in, navigate to the Dashboard and locate your unique API KEY. Copy the API KEY. Visit the API documentation and input your API KEY in the designated field as per the instructions in the documentation. You can now begin using the API services. The API documentation provides various interface modes to choose from, allowing you to select the most suitable one based on your needs. In the Dashboard, developers can also view statistical data on their API usage, helping to keep track of historical usage data. Additionally, NFTScan provides each registered developer with 10,000 free API calls per day.<img src="https://images.mirror-media.xyz/publication-images/jSB54qBjgmEubuERO1Sqa.png?height&#61;1560&amp;width&#61;3022" /><h3 id="step-2-review-the-api-documentation">Step 2: Review the API documentation</h3>After successfully registering your developer account for an API Key, you will need to review the NFTScan API documentation, which contains all of the API endpoints and parameters that can be used, as well as details on how to construct requests and process responses. Please read the API documentation carefully and make sure you understand how to use the API to get the data you need. the NFTScan API service is dedicated to helping developers improve the experience of getting NFT data for analysis.NFTScan currently has the largest and most comprehensive NFT Collection library on the network, supporting the full volume NFT data of Ethereum, Solana, BNBChain, Bitcoin, Polygon, Aptos, Avalanche, Arbitrum, Optimism, Fantom, Moonbeam PlatON, Cronos, Gnosis 14 blockchains, the full range of NFT data covered, providing a full set of interfaces to obtain ERC721 and ERC1155 assets and transaction, project, market statistics and other information, now supports more than 40 public interfaces for EVM-compatible chains, as well as for Solana, Aptos, Bitcoin Aptos, and Bitcoin, largely satisfying developers&#39; needs to index multiple types of NFT data.<img src="https://images.mirror-media.xyz/publication-images/5pp_OmiCJISzibHEdxSD5.png?height&#61;1660&amp;width&#61;3022" />What basic data do I need to get from the NFTScan NFT API to develop a complete NFT trading marketplace?<ol><li>NFT Metadata: Each NFT contains metadata that describes the attributes, features, and content of the NFT. Metadata typically includes the name, description, image or video links, creator information, and more. Obtaining the metadata of an NFT is crucial for building a transaction marketplace as it provides the basic information and attractiveness of the NFT.</li><li>NFT Asset Data: This includes NFT project information, asset listings, asset details, price trends, and more. These data allow users to browse and search for NFT assets and understand their price fluctuations.</li><li>NFT Transaction Data: This includes transaction price, transaction quantity, transaction time, and more. These data showcase the real-time market trends and popularity of NFTs, allowing users to stay informed about the latest market trading activities.</li><li>NFT Account Wallet Data: This includes the account&#39;s NFT asset listings, transaction records, and more. These data are used to verify the source of assets and the counterparty information during NFT transactions.</li><li>NFT Trading Rankings Data: This includes rankings based on total market value, sales volume, collectibles, and more. These ranking data showcase popular projects and trending assets in the NFT market, attracting users&#39; attention to high-performing NFTs.</li><li>NFT Project Data: This includes project names, issuer information, community data, development roadmap, and more. These data provide users with in-depth insights into the basic information and development plans of NFT projects.</li><li>Analytical Data: This includes industry reports, user profiles, transaction analysis, and more. These data can be used to analyze the overall market and the development trends of key projects, providing valuable insights for decision-making purposes.</li></ol><img src="https://images.mirror-media.xyz/publication-images/7hDh7A3fEuBN1bddff6QB.png?height&#61;1115&amp;width&#61;1080" />Indeed, NFT asset data, transaction data, account data, rankings data, and project data form the foundation for developing a transaction marketplace. These core data elements enable users to browse the market and engage in interactions on the platform, serving as the cornerstone for building an NFT trading platform. Additional analytical data and content data can further enrich the application, enhancing user engagement and experience.<h3 id="step-3-sort-out-the-functions-and-steps">Step 3: Sort out the functions and steps</h3>Determining marketplace functionality and requirements includes determining the functions that the NFT trading marketplace needs to support, such as buying and selling transactions, auctions, bidding, browsing NFT listings, and search functions for NFTs.Major steps to design the database model:<ol><li>Design and plan the database model for storing user information, NFT data, transaction records, etc.</li><li>Create back-end server: Select appropriate back-end framework (e.g. Node.js, Django, Ruby on Rails, etc.), use API keys and corresponding API endpoints, and write back-end code to handle functions such as NFT data acquisition, transaction request processing, and user authentication.</li><li>Implement user authentication and authorization: Develop user registration, login, and authentication functions to ensure that only authenticated users can transact and manage NFT.</li><li>Implement NFT list and search function: use the NFT data obtained by NFTScan API and display the NFT list in the market, provide search and filter function, so that users can browse and find the NFT of interest.</li><li>Realize trading function: According to the demand of the trading market, realize the functions of buying and selling transactions, auctions and bidding of NFTs. Process users&#39; transaction requests, order confirmations, payments and NFT ownership transfers.</li><li>Design and develop front-end applications: Use appropriate front-end technologies (e.g. React, Vue.js, etc.) to create user-friendly front-end interfaces that enable users to browse NFT, initiate trade requests, manage accounts, etc.</li><li>Introduce payment systems: Integrate appropriate payment systems so that users can make payments and receive payments. Ensure that the payment process is safe and secure.</li><li>Security and fraud prevention: Consider the security of the trading market, including data encryption, prevention of fraudulent transactions, and protection against malicious attacks. Ensure that users&#39; transactions and personal information are protected.</li><li>Conduct comprehensive testing and debugging and deployment and go-live: Conduct comprehensive testing of the developed marketplace to ensure proper functioning and stability of functions and fix possible problems and vulnerabilities. Then deploy the marketplace to an available server and conduct comprehensive testing to ensure that users can access and use it smoothly.</li></ol><h3 id="step-4-build-the-api-request">​Step 4: Build the API request</h3>Once the desired API endpoints and parameters are found in the NFTScan API documentation, developers can write API request code using their chosen programming language.<ol><li>Choose a programming language: Select a programming language that you are familiar with or prefer, such as Python, JavaScript, Java, etc. Ensure that the chosen programming language supports HTTP requests.</li><li>Import the required HTTP library: Depending on the chosen programming language, import the corresponding HTTP library, such as the Requests library (Python), Axios library (JavaScript), etc. These libraries will help developers send HTTP requests and handle responses.</li><li>Construct API requests: Based on the information provided in the API documentation, construct the API requests. This involves the following aspects:</li></ol>API request URL: Set the API&#39;s URL as the target of the request. Request method: Choose the appropriate HTTP request method, such as GET, POST, etc. Request headers: Set the request headers based on the requirements specified in the API documentation. This may include authorization headers with the API key, among others. Request parameters and payload: Set the request parameters and payload data as required by the API documentation to fulfill the developer&#39;s needs. Send the request and handle the response: Using the chosen HTTP library, send the constructed API request and retrieve the response. Parse and handle the returned data according to the provided response data format in the API documentation.For example, to construct an API request to retrieve the metadata of Bored Ape Yacht Club (BAYC), you can use the NFTScan NFT API documentation or reference documentation to learn how to use the API to fetch NFT metadata for a given contract address.The BAYC contract address is <a href="https://www.nftscan.com/0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d" rel="noopener noreferrer nofollow">https://www.nftscan.com/0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d</a>.To access the NFTScan API endpoint and pass the required parameters using an HTTP GET request, you can use the requests library in Python. Here&#39;s an example of how to construct the request:<img src="https://images.mirror-media.xyz/publication-images/LbG-k77PpOkTXam6m5R08.png?height&#61;1124&amp;width&#61;1036" />This code uses the requests library to send a GET request to the NFTScan NFT API and constructs the request URL using the BAYC contract address. your_api_key needs to be replaced with the NFTScan API key. The returned JSON data can then be parsed to access the NFT metadata, such as name, description, and other fields.Another example is to use the NFTScan NFT API to call the asset data of an NFT Collection, where the contract address of Azuki is obtained as follows: <a href="https://www.nftscan.com/0xed5af388653567af2f388e6224dc7c4b3241c544" rel="noopener noreferrer nofollow">https://www.nftscan.com/0xed5af388653567af2f388e6224dc7c4b3241c544</a>.Using an HTTP GET request to access NFTScan&#39;s API endpoint and pass the required parameters, the request can be constructed using Python&#39;s requests library like this:<img src="https://images.mirror-media.xyz/publication-images/Y_CGhQpaHTSIfKd-VRkrI.png?height&#61;824&amp;width&#61;1032" />This code uses the requests library to send a GET request to the NFTScan NFT API and constructs the request URL using Azuki&#39;s contract address, then parses the returned JSON data to access Azuki&#39;s asset data.Developers can pull in NFT data based on their build requirements, and the NFTScan NFT API provides developers with a powerful NFT data resource for building a variety of NFT-related applications and solutions. Whether developing a simple NFT trading marketplace or a complex NFT ecosystem, the NFTScan NFT API provides developers with the comprehensive NFT data they need.

How to Develop a Multi-chain NFT Marketplace Using the NFTScan NFT API?

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