NFT Development in the Gravity Ecosystem: How to Leverage API Tools to Build Web3 Applications

Understanding Gravity and Its NFT Ecosystem

Gravity is a Layer-1 blockchain built for large-scale applications and the future of cross-chain interoperability. By combining zero-knowledge proofs, advanced consensus mechanisms, and re-staking architectures, it achieves a unified high-performance and strong security. Its cross-chain settlement protocol allows developers to build cross-chain applications without needing to understand the complexities of multi-chain interactions.

Data shows that as of August 27, the NFT ecosystem on Gravity Network has reached a considerable scale: a total of 18,633 NFT assets issued, covering 32 collections, generating 18,700 interaction records, and attracting 17,630 active wallet addresses. These figures reflect developer recognition of this emerging public chain.

Why Choose NFTScan for Development

For developers looking to build NFT applications on Gravity, choosing the right data query tool is crucial. As an industry-leading NFT data platform, NFTScan boasts the largest and most comprehensive NFT Collection database across the web, supporting 25 public chains including Ethereum, Solana, BNB Chain, Bitcoin, Mint, and more, with over 60 public APIs for EVM-compatible chains.

What does this mean? Simply put, NFTScan not only provides standardized API services but also offers extensive, timely data coverage, helping developers quickly index various NFT standards such as ERC721, ERC1155, ERC404, ERC6551, as well as transaction, project, and market statistics across multiple dimensions.

Quick Start: Developer Account and API Key

Before starting development, basic setup is required. First, visit the official NFTScan website and click the API Sign Up button to register a developer account. After successful login, you can find your unique API authentication key on the Dashboard panel. Copy and keep it safe—this is the credential for all subsequent API calls.

It’s worth noting that NFTScan provides each registered developer with an API call quota of 1 million CU (compute units) for all NFT API endpoints. Importantly, this quota never expires and is used until exhausted. For startups and individual developers, this significantly reduces development costs.

Once authenticated, access the NFTScan API documentation, input your API Key in the appropriate place, and you can start exploring various interfaces. The Dashboard also offers usage statistics, making it easy for developers to track historical usage.

Core Models of Gravity NFT API

NFTScan’s API capabilities within the Gravity ecosystem are divided into three core models, each corresponding to different data dimensions and application scenarios.

Assets Model: Unique Identity of NFTs

In the NFT world, Assets are the most critical data fields. They uniquely identify and describe each digital asset, recording its entire lifecycle from creation to destruction. Through the Retrieve Assets series of interfaces, developers can query asset information in multiple ways:

• Batch retrieval of NFTs owned by a wallet address
• Query all NFTs under a specific contract address
• Get detailed info of a single NFT by Token ID
• Search for NFTs with specific features using attribute filters

These interfaces provide fundamental data support for building NFT wallets, trading platforms, and collection display applications.

Transactions Model: Tracking NFT Flows

Transaction records reflect the movement of NFT assets within the ecosystem. NFTScan’s Transactions API captures all types of transaction events such as Mint (minting), Transfer, Sale, and Burn (destruction). Developers can:

• Query the complete transaction history of a wallet address
• Track trading activity of a specific NFT Collection
• Analyze transaction records of individual NFTs
• Filter transactions by time period and event type

This is essential for building NFT analytics tools, investment decision support systems, and more.

Collections Model: Insights at the Project Level

NFTScan aggregates off-chain data such as social media, descriptions, and floor prices for each collection via APIs from major NFT marketplaces. The Collections interface allows developers to:

• Query detailed collection info and holder distribution
• Search and sort multiple collections
• Obtain collection statistics (average price, trading volume, etc.)
• Track blue-chip projects

Advanced Data Analysis Capabilities

Beyond basic asset, transaction, and collection queries, NFTScan also offers statistical analysis interfaces suitable for building dashboards and in-depth analysis applications.

Collection Statistics: In-Depth Project Analysis

Includes transaction distribution, Trending Statistics (popularity ranking), holder distribution, holding period distribution, and blue-chip project statistics. Developers can quickly build project filters to identify NFT collections aligned with investment strategies.

Account Statistics: User Asset Overview

Provides wallet overview statistics, holding distribution, and holding trends, suitable for developing personal asset management tools and portfolio tracking applications.

Analytic Statistics: Industry-Level Data

Used to obtain macro data such as transaction rankings and Mint counts on the Gravity network, supporting market analysis and trend research.

Metadata Refresh: Keeping Data Up-to-Date

Developers can submit backend tasks to refresh metadata for specific NFTs or entire contracts, ensuring displayed information remains current.

Practical Example: Querying the Galxe-OAT Collection

Let’s demonstrate how to use the NFT API with a real example. Take the Galxe-OAT (contract address: 0xcbe29f1a6685a90f68552988898baebb59ea4374) as an example.

Step 1: Get Collection Details

Use the Get an NFT collection endpoint /v2/collections/{contract_address} to query an overview, description, holder distribution, average price, floor price, and more.

Step 2: Query Assets in the Collection

Use the Get NFTs by contract endpoint /v2/assets/{contract_address} to list all NFT items under the collection. Results are sorted by Token ID in ascending order for easy traversal.

Step 3: Analyze Transaction History

Use the Get transactions by contract endpoint /v2/transactions/{contract_address} to retrieve all transaction records for the collection. Supports filtering by event type (Mint/Transfer/Sale/Burn), separated by semicolons. The returned data includes transaction hash, From and To addresses, block info, gas consumption, timestamp, and other key details, sufficient for detailed market analysis.

Step 4: Statistical Analysis

Use the Collection Statistics endpoint /v2/statistics/collection/{contract_address} to get analytical overview, including trading volume, number of active users, Mint trends, etc.

Coding Example: Building an API Request with Python

Developers can write code in Python, JavaScript, Java, and other languages to call NFT APIs. In Python, the requests library is most convenient.

Here is an example implementation to query Galxe-OAT asset details: