ChainGate RPC endpoints

ChainGate provides RPC endpoints for all supported networks — both EVM and UTXO. One API key gives you a free Ethereum RPC, a Polygon endpoint for live gwei pricing, an Avalanche RPC, and endpoints for every other supported chain — no need to sign up with Infura, Alchemy, or any other provider.

Available networks

Access the endpoints via cg.rpcUrls:

import { ChainGate } from 'chaingate'

const cg = new ChainGate()

console.log(cg.rpcUrls.ethereum)   // https://api.chaingate.dev/rpc/ethereum?api_key=...
console.log(cg.rpcUrls.bitcoin)    // https://api.chaingate.dev/rpc/bitcoin?api_key=...
console.log(cg.rpcUrls.polygon)    // https://api.chaingate.dev/rpc/polygon?api_key=...

EVM networks

Network	Property	Chain ID
Ethereum	cg.rpcUrls.ethereum	1
Polygon	cg.rpcUrls.polygon	137
Arbitrum	cg.rpcUrls.arbitrum	42161
Base	cg.rpcUrls.base	8453
Avalanche	cg.rpcUrls.avalanche	43114
BNB Smart Chain	cg.rpcUrls.bnb	56
Sonic	cg.rpcUrls.sonic	146

UTXO networks

Network	Property
Bitcoin	cg.rpcUrls.bitcoin
Bitcoin Testnet	cg.rpcUrls.bitcoinTestnet
Bitcoin Cash	cg.rpcUrls.bitcoincash
Litecoin	cg.rpcUrls.litecoin
Dogecoin	cg.rpcUrls.dogecoin

Free tier included

All RPC endpoints are included in the free API key. Get yours at ChainGate's Dashboard.

Use with external libraries

These are standard JSON-RPC endpoints. They work with any Ethereum library out of the box — ethers.js, viem, web3.js, or plain fetch.

ethers.js

import { ethers } from 'ethers'
import { ChainGate } from 'chaingate'

const cg = new ChainGate()
const provider = new ethers.JsonRpcProvider(cg.rpcUrls.ethereum)

const blockNumber = await provider.getBlockNumber()
const balance = await provider.getBalance('0x...')
console.log('Block:', blockNumber, 'Balance:', ethers.formatEther(balance))

viem

import { createPublicClient, http } from 'viem'
import { mainnet } from 'viem/chains'
import { ChainGate } from 'chaingate'

const cg = new ChainGate()

const client = createPublicClient({
  chain: mainnet,
  transport: http(cg.rpcUrls.ethereum),
})

const blockNumber = await client.getBlockNumber()
const balance = await client.getBalance({ address: '0x...' })

web3.js

import Web3 from 'web3'
import { ChainGate } from 'chaingate'

const cg = new ChainGate()
const web3 = new Web3(cg.rpcUrls.ethereum)

const blockNumber = await web3.eth.getBlockNumber()
const balance = await web3.eth.getBalance('0x...')

Read current Polygon gas prices (gwei)

import { ethers } from 'ethers'

const provider = new ethers.JsonRpcProvider(cg.rpcUrls.polygon)
const feeData = await provider.getFeeData()

console.log('Gas price (gwei):', ethers.formatUnits(feeData.gasPrice ?? 0n, 'gwei'))

Direct fetch (EVM)

const cg = new ChainGate()

const response = await fetch(cg.rpcUrls.ethereum, {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    jsonrpc: '2.0',
    method: 'eth_blockNumber',
    params: [],
    id: 1,
  }),
})

const { result } = await response.json()
console.log('Block number:', parseInt(result, 16))

info

The RPC URLs already include your API key as a query parameter. No additional authentication headers are needed.

Prefer push over polling?

The same API key also opens the real-time event streams — new blocks, balance changes, transaction activity and pending transactions per address, delivered over WebSocket on Bitcoin, Litecoin, Dogecoin, Bitcoin Cash, Ethereum and Avalanche. See Events.