Supported ChainX Layer

X Layer API

Access X Layer via the Spectrum unified API. X Layer is OKX’s Polygon CDK zkEVM L2.

Properties

Property	Value
Slug	`xlayer`
Type	zkEVM L2
Native Token	OKB
Chain ID	`196`

Available Methods

Method	Description
getBlockHeight	Latest X Layer block number
getBalance	OKB 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
getCode	Contract bytecode check
simulateCall	Simulate a contract call
rpcProxy	Raw JSON-RPC passthrough
getChainHealth	X Layer RPC health check

Quick Start

Get the latest X Layer block height:

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

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

Get Balance

Retrieve the OKB balance for a wallet address on X Layer:

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

{
  "jsonrpc": "2.0",
  "method": "getBalance",
  "params": {
    "chain": "xlayer",
    "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" \

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

SDK


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

DeFi

Standard EVM endpoints; DeFi protocol integrations are added as they roll out.