> ## Documentation Index
> Fetch the complete documentation index at: https://goldrush.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Cronos zkEVM Onchain Data API

> Get token balances and transactions for Cronos zkEVM. 22 endpoints supported.

## Overview

> [!TIP]
>
> Cronos zkEVM Mainnet is a zero-knowledge layer 2 network that was launched in a partnership between Cronos Labs and Matter Labs (the team behind zkSync) and Crypto.com.

GoldRush offers the most comprehensive Cronos zkEVM 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 Cronos zkEVM Data APIs provide fast, accurate, and developer-friendly access to the essential onchain data you need.

### Supported APIs

> [card] [Foundational API](https://goldrush.dev/docs/goldrush-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.**

## Mainnet

| Property | Value |
| - | - |
| **Chain Name** | `cronos-zkevm-mainnet` |
| **Chain ID** | `388` |
| **Network Type** | Community Chain |
| **Support Level** | community |
| **Block Explorer** | [Explorer](https://explorer.zkevm.cronos.org) |
| **Official Website** | [Cronos zkEVM Website](https://docs.cronos.org/cronos-zkevm/cronos-zkevm) |
| **Native Gas Token** | zkCRO |

## API Usage

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

#### Chain Name

* `cronos-zkevm-mainnet` (mainnet)

#### Example API Calls

```bash Chain Name (Mainnet) theme={null}
curl -X GET "https://api.covalenthq.com/v1/cronos-zkevm-mainnet/address/0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045/balances_v2/?key=<GOLDRUSH_API_KEY>"
```

#### SDK Usage

```typescript TypeScript SDK (Mainnet) theme={null}
import { GoldRushClient } from "@covalenthq/client-sdk";

const client = new GoldRushClient("<GOLDRUSH_API_KEY>");
const resp = await client.BalanceService.getTokenBalancesForWalletAddress({
    chainName: "cronos-zkevm-mainnet",
    walletAddress: "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
});
```

## Foundational API Support

This chain supports **22**  GoldRush Foundational APIs:

#### Wallet API

* **[ERC-20 Token Balance API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/balances/get-token-balances-for-address.md)**
* **[Native Token Balance API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/balances/get-native-token-balance.md)**
* **[Historical Portfolio Value API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/balances/get-historical-portfolio-value-over-time.md)**
* **[ERC-20 Token Transfers API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/balances/get-erc20-token-transfers-for-address.md)**

#### Pricing API

* **[Historical Token Price API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/utility/get-historical-token-prices.md)**

#### Security API

* **[Token Approvals API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/security/get-token-approvals-for-address.md)**

#### Transactions API

* **[Transaction API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/transactions/get-a-transaction.md)**
* **[Wallet Transaction Summary API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/transactions/get-transaction-summary-for-address.md)**
* **[Earliest Wallet Transactions API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/transactions/get-earliest-transactions-for-address-v3.md)**
* **[Wallet Transaction History API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/transactions/get-recent-transactions-for-address-v3.md)**
* **[Paginated Wallet Transactions API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/transactions/get-paginated-transactions-for-address-v3.md)**
* **[Time Bucket Transactions API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/transactions/get-time-bucket-transactions-for-address-v3.md)**
* **[Block Transactions API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/transactions/get-all-transactions-in-a-block.md)**
* **[Block Transactions API by Page on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/transactions/get-all-transactions-in-a-block-by-page.md)**

#### Block Explorer API

* **[Block API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/utility/get-a-block.md)**
* **[Block Heights API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/utility/get-block-heights.md)**
* **[Chain Status API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/utility/get-all-chain-statuses.md)**
* **[Contract Event Logs API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/utility/get-log-events-by-contract-address.md)**
* **[Event Logs API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/utility/get-logs.md)**
* **[Event Logs by Topic Hash API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/utility/get-log-events-by-topic-hash.md)**
* **[Gas Price API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/utility/get-gas-prices.md)**
* **[Supported Chains API on Cronos zkEVM](https://goldrush.dev/docs/api-reference/foundational-api/utility/get-all-chains.md)**

## Additional Resources

* [GoldRush API Documentation](https://goldrush.dev/docs/)
* [Supported Chains List](https://goldrush.dev/chains/)
* [API Reference](https://goldrush.dev/docs/api-reference/)


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