Supported ChainArbitrum

Arbitrum API

Access Arbitrum via the Spectrum unified API. Arbitrum is an Ethereum L2 optimistic rollup with high throughput and low transaction costs, making it one of the most popular Layer 2 networks for DeFi.

Properties

Property	Value
Slug	`arbitrum`
Type	EVM L2
Native Token	ETH
Chain ID	`42161`

Available Methods

Method	Description
getBlockHeight	Latest Arbitrum block number
getBalance	ETH balance for a wallet
getTokenBalance	ERC-20 token balance
getTokenMetadata	ERC-20 token info
getTokenAllowance	Token spending allowance
getPortfolio	Full portfolio with USD values
getNftCollection	NFT holdings for a wallet
getBlockTransactions	Transactions in a block
estimateGas	Gas estimation for a transaction
traceTransaction	Internal call trace
getHistoricalBalance	Balance at a historical block
getCode	Contract bytecode check
simulateCall	Simulate a contract call
rpcProxy	Raw JSON-RPC passthrough
getChainHealth	Arbitrum RPC health check

Quick Start

Get the latest Arbitrum block height:

curl -X POST https://your-endpoint.simplystaking.xyz/v1 \
  -H "Content-Type: application/json" \
  -H "X-API-Key: YOUR_KEY" \

{
  "jsonrpc": "2.0",
  "method": "getBlockHeight",
  "params": {
    "chain": "arbitrum"
  },
  "id": 1
}

Get Balance

Retrieve the ETH balance for a wallet address on Arbitrum:

curl -X POST https://your-endpoint.simplystaking.xyz/v1 \
  -H "Content-Type: application/json" \
  -H "X-API-Key: YOUR_KEY" \

{
  "jsonrpc": "2.0",
  "method": "getBalance",
  "params": {
    "chain": "arbitrum",
    "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
  },
  "id": 1
}

Get Gas

Compare current gas prices across chains:

curl -X POST https://your-endpoint.simplystaking.xyz/v1 \
  -H "Content-Type: application/json" \
  -H "X-API-Key: YOUR_KEY" \

{
  "jsonrpc": "2.0",
  "method": "compareGas",
  "params": {},
  "id": 1
}

SDK


import { Spectrum } from '@spectrum-nodes/sdk';
 
const spectrum = new Spectrum({ api: 'https://your-endpoint.simplystaking.xyz/YOUR_API_KEY/' });
 
// Get latest block height
const block = await spectrum.core.getBlockHeight('arbitrum');
console.log(block.height);
 
// Get ETH balance on Arbitrum
const balance = await spectrum.tokens.getBalance('arbitrum', '0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045');
console.log(balance.balance);

DeFi

Arbitrum is supported by the following DeFi protocols on Spectrum:

Aave V3 — lending and borrowing markets
Compound V3 — lending and borrowing protocol
Beefy — yield optimizer vaults


// Get Aave V3 lending yields on Arbitrum
const yields = await spectrum.yields.getLending({
  chain: 'arbitrum',
  protocol: 'aave-v3'
});
 
// Get Compound V3 yields on Arbitrum
const compound = await spectrum.yields.getLending({
  chain: 'arbitrum',
  protocol: 'compound-v3'
});
 
// Get Beefy vault yields on Arbitrum
const vaults = await spectrum.yields.getLending({
  chain: 'arbitrum',
  protocol: 'beefy'
});