Skip to main content

​
Overview

Ethereum is the foundational smart contract platform powering the majority of DeFi, NFTs, and Web3 innovation. The most secure and decentralized programmable blockchain.
GoldRush offers the most comprehensive Ethereum 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 Ethereum 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.

Streaming API

Subscribe to real-time blockchain events with sub-second latency using GraphQL over WebSockets. Track token transfers, DEX activity, wallet movements, and OHLCV candlestick data across fast chains like Base and Solana.

Use cases: Trading bots & dashboards, gaming, and AI Agents.

​
Mainnet

PropertyValue
Chain Nameeth-mainnet
Chain ID1
Network TypeFoundational Chain
Support Levelfoundational
Block ExplorerEtherscan
Official WebsiteEthereum Website
Native Gas TokenETH

​
Testnets

​
Holesky Testnet

PropertyValue
Chain Nameeth-holesky
Chain ID17000
PurposeDevelopment and testing network
Support Levelfrontier
Block ExplorerHolesky Etherscan
Official WebsiteHolesky Testnet Website
Native Gas TokenETH

​
Ethereum Sepolia Testnet

PropertyValue
Chain Nameeth-sepolia
Chain ID11155111
PurposeDevelopment and testing network
Support Levelfoundational
Block ExplorerSepolia Etherscan
Official WebsiteEthereum Sepolia Testnet Website
Native Gas TokenETH

​
API Usage

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

​
Chain Name

  • eth-mainnet (mainnet)
  • eth-holesky (testnet)
  • eth-sepolia (testnet)

​
Example API Calls

curl -X GET "https://api.covalenthq.com/v1/eth-mainnet/address/0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045/balances_v2/?key=API_KEY"

​
SDK Usage

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

const client = new GoldRushClient("API_KEY");
const resp = await client.BalanceService.getTokenBalancesForWalletAddress({
    chainName: "eth-mainnet",
    walletAddress: "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
});

​
Foundational API Support

This chain supports 28 GoldRush Foundational APIs:

​
Wallet API

​
NFT API

​
Pricing API

​
Security API

​
Activity Feed API

​
Block Explorer API

​
Streaming API Support

This chain supports 8 GoldRush Streaming APIs:

​
Additional Resources