Zerion

Overview

Zerion API is a REST API for onchain wallet data. It returns token balances, DeFi positions, NFTs, decoded transaction history, PnL and prices for any address on Avalanche C-Chain, other EVM chains and Solana. Responses are priced and normalized, so one request gives the data that a wallet or portfolio screen needs.

Features

• Wallet portfolio: Total value, broken down by chain and position type
• Fungible positions: Token balances and DeFi positions (lending, liquidity, staking) across protocols on C-Chain
• Decoded transaction history: Transfers, swaps, approvals and fees, with dapp context
• NFTs: NFT positions and collections, with floor prices
• Wallet PnL: Realized and unrealized PnL, FIFO-based
• Token prices: Prices and charts for tokens
• Spam filtering: Spam tokens are filtered out of responses
• Webhooks: Real-time notifications for wallet activity

Getting Started

1. Get an API key: Create a key in the Zerion Dashboard.
2. Authenticate: Use HTTP Basic Auth, with the API key as the username.
3. Query a wallet on Avalanche C-Chain: Filter by the avalanche chain ID.

curl -u "YOUR_API_KEY:" \
  "https://api.zerion.io/v1/wallets/0xYourAddress/positions/?filter[chain_ids]=avalanche&currency=usd"

Documentation

For guides and the API reference, visit the Zerion API Documentation.

• Supported chains
• API reference

Use Cases

• Wallets: Show balances, DeFi positions and activity feeds to Avalanche users
• Portfolio trackers and dashboards: Show holdings and performance across chains
• Exchanges and fintech apps: Show users their self-custody holdings
• Tax and accounting tools: Use decoded transaction history
• AI agents: Read wallet state