Monad Onchain Data API

Get token balances and transactions for Monad. 22 endpoints supported.

Overview

Monad redefines L1 scalability with 10,000 TPS, 1-second finality, and near-zero gas fees while maintaining full EVM compatibility. The next generation of high-performance blockchains.

GoldRush offers the most comprehensive Monad 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 Monad 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

JSON-RPC

Low-latency EVM JSON-RPC with global failover and archive depth. Point your existing tooling at the GoldRush endpoint — no code changes required.

Use cases: dApps, wallets, indexers, bots, and trading infrastructure.

Read docs

Mainnet

Property	Value
Chain Name	monad-mainnet
Chain ID	143
Network Type	Frontier Chain
Support Level	frontier
Block Explorer	Monad Blockchain Explorer
Official Website	Monad Website
Native Gas Token	MON

API Usage

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

Chain Name

• monad-mainnet (mainnet)

Example API Calls

Chain Name (Mainnet)

curl -X GET "https://api.covalenthq.com/v1/monad-mainnet/address/0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045/balances_v2/?key=<GOLDRUSH_API_KEY>"

SDK Usage

TypeScript SDK (Mainnet)

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

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

Foundational API Support

This chain supports 22 GoldRush Foundational APIs:

Wallet API

• ERC-20 Token Balance API on Monad
• Native Token Balance API on Monad
• Historical Portfolio Value API on Monad
• ERC-20 Token Transfers API on Monad

Pricing API

• Historical Token Price API on Monad

Security API

• Token Approvals API on Monad

Transactions API

• Transaction API on Monad with-classification
• Wallet Transaction Summary API on Monad
• Earliest Wallet Transactions API on Monad with-classification
• Wallet Transaction History API on Monad with-classification
• Paginated Wallet Transactions API on Monad with-classification
• Time Bucket Transactions API on Monad
• Block Transactions API on Monad
• Block Transactions API by Page on Monad

Block Explorer API

• Block API on Monad
• Block Heights API on Monad
• Chain Status API on Monad
• Contract Event Logs API on Monad
• Event Logs API on Monad
• Event Logs by Topic Hash API on Monad
• Gas Price API on Monad
• Supported Chains API on Monad

Transaction Classification (with-classification)

Monad supports transaction classification. Pass with-classification=true to the Transactions API to get a type (such as swap or send_token), a category, a plain-English description, and the assets sent and received for each transaction.

Transaction classification costs 0.05 credits/item.

Example API Call

Recent transactions with classification

curl -X GET "https://api.covalenthq.com/v1/monad-mainnet/address/0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045/transactions_v3/?with-classification=true&key=<GOLDRUSH_API_KEY>"

JSON-RPC

Monad is available on the GoldRush JSON-RPC service. Point your existing EVM tooling (ethers.js, viem, web3.js, or raw HTTP) at the GoldRush endpoint — the standard eth_*, net_*, web3_*, debug_*, and trace_* methods are supported.

Endpoint

https://rpc.goldrushdata.com/v1/monad-mainnet

Example JSON-RPC Calls

eth_blockNumber

curl https://rpc.goldrushdata.com/v1/monad-mainnet \
  -H "Authorization: Bearer <GOLDRUSH_API_KEY>" \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_blockNumber","params":[]}'

Sample Methods

• eth_blockNumber on Monad
• eth_getBalance on Monad
• eth_call on Monad
• eth_getLogs on Monad
• eth_getTransactionReceipt on Monad

See the full method list and per-method examples for Monad.

Additional Resources

• GoldRush API Documentation
• Supported Chains List
• API Reference