Exploring the Features of Top 10 NFT APIs on Polygon

nft api

Most read

Loading Most Ready posts..

The emergence of NFTs transforms how we perceive digital ownership, and the Polygon network has gained significant popularity as a blockchain platform for NFT-related endeavors. Polygon provides a unique ecosystem for NFT development and transactions, characterized by scalability, affordability, and a thriving community. To enhance the seamless integration and advanced capabilities of NFTs on the Polygon network, a wide range of NFT APIs have been developed, empowering developers with powerful tools and features.

Here are the top 10 NFT APIs on Polygon. Note that some of these are multi-chain, i.e., support other blockchains.

Ownerfy API 

Ownerfy API provides a comprehensive set of features and functionalities to enable developers to integrate NFT capabilities into their applications, websites, or platforms seamlessly. With the Ownerfy API, developers can leverage various functionalities such as wallet creation, direct minting to customer wallets, QR code generation, NFT metadata updates, smart contract deployment, and bulk NFT transfers.

One of the significant advantages of the Ownerfy API is that it allows developers to incorporate NFT capabilities without requiring their customers to have prior knowledge of blockchain or crypto. The entire process can be completely invisible to the customer, providing a seamless user experience within the developer’s application or website. 

The Ownerfy API handles all the complexities of cryptocurrency under the hood, eliminating the need for developers to manage blockchain backend infrastructure or hire blockchain developers. It manages transactions efficiently, retrying them as necessary to account for adverse or unreliable blockchain conditions. 

Alchemy NFT API

The Alchemy NFT API, provided by Alchemy, is a valuable tool for Polygon developers looking to incorporate NFTs into their applications. This API allows easy access to data related to NFTs on various blockchains, providing detailed information such as metadata, ownership, and transaction history. It offers advanced features like batch queries and real-time event subscriptions, enabling developers to build high-performance and reliable NFT-based applications.

With the Alchemy NFT API, developers can fetch and display NFTs for their users, making it suitable for creating NFT projects like digital art marketplaces or collectibles platforms. The API supports actions such as resolving wallet addresses based on ENS domains, obtaining a list of NFT holders for a specific collection, retrieving all NFTs owned by an address, checking the owner of an NFT, and filtering out spam NFTs.

To start with the Alchemy NFT API, their quickstart guide in the official documentation explains the process of setting up the repository, choosing a package manager, selecting a suitable library (such as Alchemy SDK, Javascript Fetch, or Javascript Axios), and installing the necessary dependencies. It provides step-by-step instructions to initialize projects, install the Alchemy SDK, and execute sample code for interacting with the NFT API.

Transpose API

The Transpose API is a tool that provides developers with easy and reliable access to real-time NFT data. It offers a range of endpoints and features that allow developers to retrieve comprehensive information about cryptocurrencies and blockchain transactions. 

Developers can use REST APIs or perform low-latency SQL queries to retrieve and manipulate data based on their requirements. The API supports pagination and provides over 50 endpoints, making it suitable for various blockchain use cases. It also offers a dedicated infrastructure for demanding workloads, ensuring high performance and availability.

Developers can also use the API to analyze financial activity, meet tax and compliance requirements, track NFTs, calculate total wallet value locked (TVL), and obtain historical NFT floor prices. It also supports direct SQL access, enabling efficient querying of indexed blockchain data.

To access the Transpose API, developers must authenticate using a valid API key. This key is included in the request header to ensure secure access. It’s essential to keep the API key confidential and avoid sharing it publicly.

Chainstack NFT API

The Chainstack NFT API provides developers with various features to fetch, search, mint, and manage NFTs, eliminating the complexities associated with gas fees, Web3 development, and blockchain infrastructure maintenance.

Developers can easily leverage the Chainstack NFT API to retrieve NFT data from the blockchain. This data includes metadata, collection information, transaction history, and floor prices. The API also offers advanced search capabilities, allowing users to find specific collections or NFTs based on name, description text, and other criteria. Additionally, developers can mint NFTs to specific addresses, transfer NFTs, update metadata, and deploy NFT smart contracts using the API.

The Chainstack NFT API operates in real-time by continuously indexing existing and new NFT smart contracts across various blockchains. It provides a user-friendly interface and a standardized API that simplifies complex Web3 programming. Developers can use the API’s minting capabilities, which include deploying smart contracts or minting NFTs while handling transaction fees.

The API supports multiple public blockchains, such as Ethereum, Polygon, BNB Smart Chain, Avalanche, and more. This multi-chain feature allows developers to launch NFT applications on different networks, expanding their reach and user base.

By choosing the Chainstack NFT API, developers gain access to robust infrastructure with high uptime and premium-level support. The API’s user-friendly interface makes integrating NFT functionality into applications easy without requiring extensive blockchain expertise.

The OpenSea Stream API

The OpenSea Stream API is a websocket-based service provided by OpenSea that enables developers to receive real-time events related to the OpenSea marketplace and NFTs. Instead of continuously polling for updates, developers can subscribe to specific events and receive immediate notifications when those events occur.

The Stream API supports a variety of events, including item listings, item sales, item transfers, item metadata updates, item cancellations, offers on items and collections, order invalidations, and order revalidations. By subscribing to these events, developers can stay updated on the latest activities on the OpenSea marketplace and NFT ecosystem.

The real-time nature of the Stream API opens up possibilities for various use cases. Here are some examples: Push Notifications, Activity Feeds, Real-Time Data Monitoring, Ownership Changes, and Metadata Updates.

To facilitate the usage of the Stream API, OpenSea provides a JavaScript SDK (Software Development Kit) that simplifies the management of connections and event subscriptions. The SDK includes a client that handles authentication and streamlines the integration of the Stream API into developer projects.

Venly API

The Venly API is a comprehensive interface provided by Venly, a blockchain platform offering developers various tools and services to integrate blockchain functionality into their applications. It enables developers to interact with blockchain wallets, create multiple types of assets, including fungible and non-fungible tokens (NFTs) such as ERC20, ERC721, and ERC1155 tokens, and interact with smart contracts. The Venly API aims to provide developers with a user-friendly interface while empowering them to efficiently incorporate blockchain capabilities into their projects.

A key feature of the Venly API is the ability to integrate instant Web3 wallets into applications, allowing users to manage their digital assets securely. This feature includes functionalities such as onboarding users, facilitating transactions, querying balances, and performing wallet-related operations. The API simplifies integrating wallet functionality, providing a seamless user experience.

In addition, the Venly API offers a comprehensive set of tools for NFT management. Developers can utilize these tools to create, manage, distribute, and secure NFTs.

The Venly API also provides a blockchain gaming toolkit that simplifies the integration of blockchain technology into gaming applications. It allows developers to focus on game development while seamlessly incorporating blockchain functionality.

For e-commerce platforms, the Venly API offers solutions for integrating NFTs into Shopify stores. A no-code solution enables users to create, mint, sell, and transfer NFTs directly from their Shopify stores.

Venly emphasizes simplicity, easy implementation, and a developer-friendly approach. The API supports multiple blockchains saving developers time and money. It provides battle-tested reliability with high uptime and offers outstanding service and support.

Blockspan NFT API

The Blockspan NFT API is a powerful interface provided by BlockSpan, a platform dedicated to simplifying the development of Web3 applications. By aggregating data from multiple blockchain networks, BlockSpan’s API enables software companies and developers to access comprehensive information about NFTs and build fast and reliable Web3 apps more efficiently.

One of the notable advantages of using the Blockspan NFT API is its direct access to real-time NFT metadata, activity, and ownership information. By bypassing intermediaries and IPFS, developers can seamlessly retrieve essential NFT data, streamlining the app creation and management process. This direct access speeds up transactions and eliminates potential delays caused by third-party providers while providing valuable insights into user behavior and preferences, aiding in product development and marketing strategies.

The Blockspan NFT API supports ERC721 and ERC1155 token standards on various blockchain networks, including Ethereum, Polygon, Arbitrum, and more.

Moralis NFT API

The Moralis NFT API is a comprehensive solution provided by Moralis Web3 that empowers Web3 developers to create and scale NFT dApps effortlessly. This API allows developers to access various NFT information from multiple blockchains. It provides features such as fetching NFT metadata, NFT collection metadata, owners of specific NFTs, and NFT transfers. The Moralis NFT API supports popular NFT standards like ERC721 and ERC1155 and non-standard NFTs such as CryptoPunks.

The NFT API caters to various use cases, including NFT marketplaces, NFT auction sites, portfolio apps, and NFT-based authentication. It offers developers a comprehensive set of pre-built functionalities, simplifying the integration of NFT capabilities into their applications. 

The NFT API is also compatible with multiple EVM chains, allowing developers to access NFT information across different blockchain networks. With its user-friendly features, the Moralis NFT API streamlines the development process and facilitates seamless interaction with NFTs on supported blockchain networks.

Center API

With Center.app, developers can access accurate and real-time blockchain data using the Center API. They can retrieve information, including wallet addresses, NFT holdings, floor prices of NFT collections, market data, metadata for specific NFTs, trading volume, and rarity calculations. The API provides a comprehensive set of endpoints that can be seamlessly integrated into different technology stacks, empowering developers to enhance their applications with new functionalities quickly.

The Center.app API is renowned for its reliability, scalability, and battle-tested nature, making it a preferred choice for crypto organizations and developers. Its primary objective is to streamline the development process by minimizing the need for indexing and data retrieval, allowing developers to focus on building innovative applications.

When it comes to pricing, the Center.app API employs a compute unit model to measure request volume. Each API endpoint consumes a specific number of compute units per request, ensuring a straightforward and transparent pricing structure. The Free plan offers up to 20 compute units per second, while the Builder plan provides up to 50 compute units per second. Enterprise customers can set their limits based on their specific requirements.

Rarible Multichain SDK

The Rarible Multichain SDK is a software development that facilitates the integration of the Rarible Protocol and enables the creation of NFT marketplaces. This SDK provides developers with various tools and functionalities to interact with blockchain technology and incorporate NFT capabilities into their applications.

By utilizing the Rarible Multichain SDK, developers can perform various actions related to NFTs, including minting, burning, selling, and transferring. The SDK offers pre-built functionalities tailored for NFT marketplace operations, empowering developers to create, list, and trade NFTs seamlessly.

It is necessary to install the SDK as a dependency in the project using package managers such as yarn or npm to get started with the Rarible Multichain SDK. The SDK supports client-side (frontend) and server-side (backend) applications. On the client side, developers can import the SDK and leverage its TypeScript typings to explore the available features. Additional packages like `form-data` and `node-fetch` might be required on the server side.

The Rarible Multichain SDK supports various blockchain wallets, including Metamask, Torus, WalletLink, MEW (MyEtherWallet), Beacon, and FCL (Flow). Developers can configure and add these wallets to the SDK’s connector, allowing users to connect and interact with their preferred wallets seamlessly.


The emergence of NFTs on the Polygon network has opened up new possibilities and opportunities for digital asset creators, collectors, and developers. As NFTs continue to gain popularity, the availability of robust and reliable NFT APIs on Polygon becomes crucial for seamless integration and interaction with the blockchain.

The featured NFT APIs on Polygon offer scalability, low transaction fees, and a vibrant ecosystem that attracts creators and collectors. By integrating these APIs, developers can tap into the potential of NFTs on Polygon and create unique user experiences.


Is there a limit to the file size or format of the media I can attach to my NFTs?

The file size and supported formats for media attachments may vary depending on the API. Refer to the API documentation for specific details.

Can I use these NFT APIs to implement royalty systems for secondary sales of my NFTs?

Some featured NFT APIs support royalty features, allowing creators to earn a percentage of the sale price when their NFTs are resold.

Are NFT APIs suitable for gaming applications built on Polygon?

Absolutely! NFT APIs can be integrated into gaming applications on Polygon, enabling the creation, trade, and utilization of in-game assets as NFTs.

Do NFT APIs support fractional ownership and fractionalized NFTs?

Some NFT APIs offer support for fractional ownership models, enabling the creation and trading of fractionalized NFTs on the Polygon network.

Can I use APIs to build a social platform for NFT enthusiasts?

Certainly! These NFT APIs provide the necessary functionalities to build social platforms where users can connect, share, and trade NFTs within the Polygon ecosystem.

Our content is derived from a thorough research, yet we acknowledge the potential for deserving businesses to be overlooked. If you’re a business owner or a reader who believes a valuable business is missing from our list, write to us at [email protected].

Share link:

Damilola Lawrence

Damilola is a crypto enthusiast, content writer, and journalist. When he is not writing, he spends most of his time reading and keeping tabs on exciting projects in the blockchain space. He also studies the ramifications of Web3 and blockchain development to have a stake in the future economy.

Stay on top of crypto news, get daily updates in your inbox

Related News

Subscribe to CryptoPolitan