Zapper
Zapper provides a comprehensive onchain data API delivering portfolio, token, NFT, and transaction data across 50+ blockchains.
Overview
Zapper is an enterprise-grade onchain data API designed to simplify access to comprehensive blockchain data across more than 50 chains. It aggregates portfolio balances, token prices, NFT metadata, transaction histories, and DeFi positions into a single GraphQL API, enabling developers to build rich, real-time blockchain applications without managing complex indexing infrastructure. The API supports a wide range of data types including tokens, NFTs, DeFi assets, and human-readable transaction details, with support for both externally owned accounts and smart contract wallets.
Intended for developers building DeFi dashboards, analytics platforms, portfolio trackers, and NFT marketplaces, Zapper eliminates months of backend development by providing ready-to-use, normalized data. Its multi-chain coverage includes major Layer 1 and Layer 2 blockchains such as Ethereum, Arbitrum, Optimism, Polygon, Avalanche, Solana, Bitcoin, and many others. The API also supports advanced features like cross-chain portfolio aggregation in a single call, detailed asset deltas, and enhanced filtering options.
Zapper stands out by combining extensive chain coverage with rich metadata and real-time updates, backed by a battle-tested infrastructure trusted by leading industry players since 2019. Its GraphQL interface offers flexibility and efficiency for querying complex data sets. Thousands of developers use Zapper to power portfolio management tools, NFT valuation engines, and transaction explorers. Getting started involves obtaining an API key from Zapper’s documentation portal and integrating the GraphQL endpoints into your application stack. Comprehensive docs, sandbox environments, and active community support via Discord and X (Twitter) facilitate onboarding and troubleshooting.
The Problem
Developers face challenges in aggregating and normalizing blockchain data from multiple chains, including tokens, NFTs, DeFi positions, and transaction histories. Building and maintaining indexing infrastructure to provide real-time, human-readable onchain data is complex and time-consuming.
The Solution
Key Features
GraphQL API
Flexible and efficient querying of complex blockchain data sets with a single endpoint.
Cross-Chain Portfolio Aggregation
Fetch complete portfolio balances and breakdowns across tokens, NFTs, and DeFi positions in one call.
Human-Readable Transaction History
Detailed transaction descriptions with asset deltas and support for smart contract wallets.
Key Strengths
How Developers Use Zapper
Multi-Chain Portfolio Trackers
Developers build dashboards that aggregate user holdings across tokens, NFTs, and DeFi protocols on multiple chains.
NFT Marketplaces and Analytics
Platforms use Zapper’s NFT metadata and valuation data to display rich collection details and floor prices.
DeFi Analytics and Tax Software
Applications leverage transaction histories and asset deltas for portfolio performance tracking and tax reporting.
Works Well WithEthereumPolygon PoSArbitrum OneOptimism
Aurora
Celo
Avalanche
Fantom
Gnosis
Moonriver
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Pricing
Free | Enterprise | |
|---|---|---|
| Price (Monthly) | Free | Custom pricing |
| Price (Annual) | Free | Custom pricing |
| Messaging | Community support via Discord and GitHub | Dedicated support and SLAs |
| Support | Community support via Discord and GitHub | Dedicated support and SLAs |
| Analytics |
Resources
Zapper provides extensive documentation, sandbox environments, and active community channels to support developers integrating its API. The docs cover portfolio data, token prices, NFTs, transactions, and chain-specific details with examples and best practices.