zkSync Era

Overview

GoldRush offers the most comprehensive zkSync Era Data API suite for developers, analysts, and enterprises. Whether you’re building a DeFi dashboard, a wallet, a trading bot, an AI agent or a compliance platform, our zkSync Era Data APIs provide fast, accurate, and developer-friendly access to the essential onchain data you need.

Supported APIs

Foundational API

Access structured historical blockchain data across 100+ chains using REST APIs. Get token balances, transaction histories, decoded event logs, NFT assets, token holders and more.

Use cases: Wallets, portfolio trackers, crypto accounting & tax tools, and DeFi dashboards.

Read docs

Mainnet

Property	Value
Chain Name	zksync-mainnet
Chain ID	324
Network Type	Frontier Chain
Support Level	frontier
Block Explorer	Explorer
Official Website	zkSync Era Website
Native Gas Token	ETH

Testnets

zkSync Sepolia Testnet

Property	Value
Chain Name	zksync-sepolia-testnet
Chain ID	300
Purpose	Development and testing network
Support Level	frontier
Block Explorer	Explorer
Official Website	zkSync Sepolia Testnet Website
Native Gas Token	ETH

zkSync Era Testnet

Property	Value
Chain Name	zksync-testnet
Chain ID	280
Purpose	Development and testing network
Support Level	frontier
Block Explorer	Explorer
Official Website	zkSync Era Testnet Website
Native Gas Token	ETH

API Usage

To use this blockchain network in GoldRush API calls, use:

Chain Name

• zksync-mainnet (mainnet)

• zksync-sepolia-testnet (testnet)

• zksync-testnet (testnet)

Example API Calls

Chain Name (Mainnet)

curl -X GET "https://api.covalenthq.com/v1/zksync-mainnet/address/demo.eth/balances_v2/?key=API_KEY"

SDK Usage

TypeScript SDK (Mainnet)

import { GoldRushClient } from "@covalenthq/client-sdk";

const client = new GoldRushClient("API_KEY");
const resp = await client.BalanceService.getTokenBalancesForWalletAddress({
    chainName: "zksync-mainnet",
    walletAddress: "demo.eth"
});

Foundational API Support

This chain supports 31 GoldRush Foundational APIs:

Pricing API

• Get historical token prices

Activity Feed API

• Get a transaction
• Get transaction summary for address
• Get earliest transactions for address (v3)
• Get recent transactions for address (v3)
• Get paginated transactions for address (v3)
• Get bulk time bucket transactions for address (v3)
• Get all transactions in a block (v3)
• Get all transactions in a block by page (v3)

Block Explorer API

• Get a block
• Get all chain statuses
• Get all chains
• Get block heights
• Get gas prices
• Get log events by contract address
• Get log events by topic hash(es)
• Get logs
• Get resolved address for registered address

Additional Resources

• GoldRush API Documentation
• Supported Chains List
• API Reference