What is Zerion?

Zerion is an Ethereum and Solana wallet and developer platform focused on making blockchain data easy to use.

Started as a portfolio tracker, Zerion has done a lot of heavy lifting to index and normalize onchain data across major EVM chains and Solana. Zerion Wallet turns onchain data into a great UX that shows everything the user owns: tokens, NFTs, DeFi positions, and more.

What is the Zerion API?

Zerion API is a single, normalized surface for wallet-level data across EVM and Solana.

Because it was created for Zerion’s own consumer products, Zerion API offers wallet data with interpreted financial meaning. Instead of raw blockchain data, you get values, types, relationships, and metadata in a ready-to-use human-readable format. Every data point you see in the Zerion app is available via Zerion API.

With one integration, you can fetch balances, tokens (including long-tail assets), NFTs, DeFi positions, historical transactions, portfolio PnL, and price context. Data is delivered via REST API in a consistent schema designed for production apps.

Zerion API replaces blockchain indexers' infrastructure with a dependable, developer-friendly interface that keeps your product fast and accurate.

Why use Zerion API?

Zerion API is built for teams that need reliable, real-time wallet context without building their own data infrastructure.

Fresh data. Wallet data updates within milliseconds of new blocks.
Battle-tested reliability. Used by Zerion Wallet and other consumer apps with millions of onchain users.
Reduced complexity. Unified schema for EVM and Solana without any nodes or indexers.

What you can build with Zerion API

Wallets & super-apps: Render balances, tokens, NFTs, DeFi positions, and PnL for any EVM and Solana addresses.
Portfolio & tax tools: Pull unified positions and transactions, normalize to USD or any other currency. Get PnL for any address or token.
Payments, treasury & reconciliation: Backfill multichain transaction history at scale and reconcile ledgers with clean data with interpreted financial meaning.
DeFi interfaces: Immediately load token balances, positions, and transactions for any connected wallet address.
Data, research & market intelligence: Ingest clean multichain wallet data without maintaining brittle indexers.
AI agents & agent platforms: Give agents onchain wallet data with low-latency reads across all endpoints.

Key capabilities at a glance

Zerion API offers everything you need to add onchain wallet data to your app:

Balances & tokens: Comprehensive token coverage on EVM and Solana, including long tail assets. Easily enrich with prices, charts, and PnL.
DeFi positions: 8,000+ protocols across all major EVM chains.
Transaction history: Interpreted transactions across all supported chains.
PnL: Including net invested amount, realized and unrealized gains for any token held by any EVM address.
NFTs: Collections and items across major EVM chains, including floor prices and consistent metadata. Webhooks: Get real-time updates for new transactions on major EVM chains and Solana.

How to get started

Sign up in Zerion’s API key form with your email. It’s better to use work email to avoid getting flagged as spam.
Get a free dev key. Once you sign up, your key will be created right away. You’ll get 3k calls per day at 2 RPS. You can increase your free limits by adding a card.
Test endpoints. You can use the docs with your API key to try making calls and get live responses.

If you have any questions, send us an email at api@zerion.io or ask a question via the chat widget.