Supported ChainBase

Base API

Access Base via the Spectrum unified API. Base is Coinbase’s OP Stack L2, designed for low-cost and high-speed transactions with the security of Ethereum.

Properties

Property	Value
Slug	`base`
Type	EVM L2
Native Token	ETH
Chain ID	`8453`

Available Methods

Method	Description
getBlockHeight	Latest Base 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	Base RPC health check

Quick Start

Get the latest Base 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": "base"
  },
  "id": 1
}

Get Balance

Retrieve the ETH balance for a wallet address on Base:

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": "base",
    "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('base');
console.log(block.height);
 
// Get ETH balance on Base
const balance = await spectrum.tokens.getBalance('base', '0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045');
console.log(balance.balance);

DeFi

Base is supported by the following DeFi protocols on Spectrum:

Aave V3 — lending and borrowing markets
Compound V3 — lending and borrowing protocol
Morpho — lending optimizer
Avantis — avUSDC vault (deposit and redemption prices)


// Get Aave V3 lending yields on Base
const yields = await spectrum.yields.getLending({
  chain: 'base',
  protocol: 'aave-v3'
});
 
// Get Compound V3 yields on Base
const compound = await spectrum.yields.getLending({
  chain: 'base',
  protocol: 'compound-v3'
});
 
// Get Morpho yields on Base
const morpho = await spectrum.yields.getLending({
  chain: 'base',
  protocol: 'morpho'
});
 
// Get Avantis avUSDC deposit & redemption prices
const avantis = await spectrum.defi.getAvantisPrice('base', { vault: 'avUSDC' });
console.log('Deposit:', avantis.depositPrice.USD);
console.log('Redemption:', avantis.redemptionPrice.USD);