How to Index NFTs on Aptos

Jacob HoekertJacob Hoekert
Dec 18, 2023|4 min read

Curious about navigating the landscape of NFT indexing on Aptos? This guide is your starting point, offering a beginner’s guide through the innovative platform of Aptos, a blockchain revolutionizing NFT management and exploration.

What is Aptos?

Aptos is a cutting-edge blockchain platform, focusing on safety and production readiness as its core attributes. It's an independent project, spearheaded by the original team behind Diem – a blockchain initially developed for similar purposes. The Aptos team comprises creators, researchers, designers, and builders with a rich history in blockchain development. Their goal is to establish Aptos as the world's most reliable and efficient Layer 1 blockchain, offering a robust foundation for various applications, including NFTs and decentralized finance (DeFi) solutions. This background positions Aptos as a promising and innovative player in the blockchain space.

How to use Aptos?

Smart Contract Language - Move:

'Move' is a smart contract language derived from Rust, known for its safety and adaptability. It's designed to efficiently handle web3 applications, enhancing resource management, scarcity, and access control. This language is particularly beneficial for decentralized autonomous organizations (DAOs) and NFTs, enabling shared account management and streamlined NFT minting within a single account.

High-Performance Transaction Processing:

Aptos adopts a unique approach to handling transactions - they're batched, pipelined, and parallelized. This method ensures each transaction stage is independent and can be processed in parallel, much like modern computer processors. This structure not only speeds up development but also supports quick, regular updates. The result is a highly efficient system capable of processing up to 150,000 transactions per second in test conditions, a stark contrast to Ethereum's 12-15 transactions per second.

Modular Design and Scalability:

The modular design of Aptos allows for seamless upgrades without halting the entire network. This flexibility is crucial for adapting to new use cases and maintaining a robust, decentralized network. Unlike other blockchains that require additional protocols for advanced features like sharding, Aptos integrates these capabilities natively, ensuring scalability and efficiency.

Understanding NFT Indexers

NFT indexers are essential tools in the world of blockchain and NFTs. They serve as databases that track, organize, and transform raw transactions involving NFTs into easily digestible and accessible data. This data includes vital information about NFTs, such as their price history, rarity, ownership records, and current status (like marketplace listings or staking details).

Key NFT indexers like, nxyz, and Reservoir vary in their focus and data presentation, with some specializing in Ethereum-based chains and others expanding to different ecosystems.

How to Index NFTs on Aptos:

Step 1: Understand the Aptos Indexer

A sophisticated system designed to convert complex blockchain ledger data into an organized and user-friendly format. This tool is particularly vital for applications that demand quick data access and detailed information, like those used in NFT marketplaces. The Indexer essentially takes the raw, often convoluted data from blockchain transactions and restructures it into a clear, easily understandable form. This process not only simplifies data analysis but also enhances the overall user experience by providing rich, low-latency data essential for real-time applications in NFTs.

Step 2: Choose Your Role

Depending on your needs, you can choose different roles to interact with the Aptos Indexer:

Core Infra Provider:

Ideal for those who want complete control, this role involves running your own Transaction Stream Service, managing the entire data stack from the ground up.

API Operator:

Suitable for users who prefer to operate the Indexer API while utilizing an externally hosted Transaction Stream Service, offering a balance between control and convenience.

Custom Processor Builder:

For developers looking to tailor their data processing, this role allows building custom processors atop a hosted Transaction Stream Service.

Indexer API Consumer:

Perfect for lightweight applications, this role involves using a pre-hosted Indexer API, simplifying the process for beginners or small-scale projects.

Step 3: Setting Up the Transaction Stream Service

The Transaction Stream Service provides a GRPC stream of transactions for processing. You can choose to use a hosted service by Aptos Labs or set up your own.  It streams transaction data, which is crucial for processing and indexing. You have the flexibility to either use a service hosted by Aptos Labs or deploy your own, depending on your project's scale and complexity.

Step 4: Access Indexed Data

To access and utilize the data indexed by the Aptos Indexer, you have two primary options:

Labs Hosted Indexer API:

This is an ideal choice for smaller-scale or beginner projects, such as digital wallets. It provides a user-friendly interface but comes with rate limits, making it less suitable for applications that require high data throughput.

Self-Hosted Indexer API:

For those needing more robust control and higher data handling capacity, running your own Indexer API deployment is the way to go. This option is perfect for larger, more complex applications demanding extensive data access.

Step 5: Utilizing Custom Processors

For bespoke requirements, you have the flexibility to create and implement custom processors. These are tailored to your specific application's needs, allowing for a more personalized approach to indexing and data retrieval. Writing and deploying these processors enable you to fine-tune how data is indexed and presented, ensuring that your application has the most relevant and efficient data processing capabilities.

Stay Informed and Updated

The Aptos platform, particularly the Indexer, is continually advancing, introducing new functionalities and enhancements. For beginners, it's essential to regularly check for updates and new releases. This can involve following Aptos's official channels, participating in community forums, or subscribing to newsletters. Keeping abreast of these changes ensures that you can leverage the latest tools and best practices in your work with the Indexer. This proactive approach will help you adapt to new features and maintain the efficiency and effectiveness of your applications within the Aptos framework.

On A Final Note

It's essential to understand the Aptos Indexer, select the right role for your needs, and stay updated with the platform's advancements. Whether you're managing data streams, accessing indexed data through APIs, or building custom processors, each step is crucial in harnessing Aptos's powerful blockchain capabilities.

If you are looking to start a blockchain data analytics project then look no further than, providing in-depth, multi-chain Indexing APIs for easy access and analysis of NFT data.