Multi-chain RPC

JSON-RPC and WebSocket endpoints for 30+ blockchains. Standard Ethereum JSON-RPC, chain-specific methods, and real-time subscriptions.

Bootnode provides unified JSON-RPC access to all supported blockchains through a single API endpoint. Standard Ethereum JSON-RPC methods work across all EVM chains.

Endpoint Format

POST https://api.bootno.de/v1/rpc/{chain}/{network}

Parameter	Description	Examples
`chain`	Blockchain name	`ethereum`, `polygon`, `lux`, `arbitrum`, `base`
`network`	Network type	`mainnet`, `testnet`, `devnet`

Making RPC Calls

curl -X POST https://api.bootno.de/v1/rpc/ethereum/mainnet \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_blockNumber",
    "params": [],
    "id": 1
  }'

from bootnode import Client

client = Client(api_key="YOUR_API_KEY")

# Get block number
block = await client.rpc.call(
    chain="ethereum",
    method="eth_blockNumber"
)

# Get balance
balance = await client.rpc.call(
    chain="ethereum",
    method="eth_getBalance",
    params=["0x742d35Cc6634C0532925a3b844Bc9e7595f2bD18", "latest"]
)

import { Bootnode } from '@bootnode/sdk'

const client = new Bootnode({ apiKey: 'YOUR_API_KEY' })

const block = await client.rpc.call({
  chain: 'ethereum',
  method: 'eth_blockNumber',
})

const balance = await client.rpc.call({
  chain: 'polygon',
  method: 'eth_getBalance',
  params: ['0x742d35Cc...', 'latest'],
})

WebSocket Subscriptions

Connect via WebSocket for real-time block and transaction updates:

wss://ws.bootno.de/v1/rpc/{chain}/{network}

const ws = new WebSocket('wss://ws.bootno.de/v1/rpc/ethereum/mainnet')

ws.send(JSON.stringify({
  jsonrpc: '2.0',
  method: 'eth_subscribe',
  params: ['newHeads'],
  id: 1,
}))

ws.onmessage = (event) => {
  const data = JSON.parse(event.data)
  console.log('New block:', data.params.result.number)
}

Supported Chains

Chain	Mainnet	Testnet	Methods
Ethereum	Yes	Sepolia, Holesky	Full EVM
Polygon	Yes	Amoy	Full EVM
Arbitrum	Yes	Sepolia	Full EVM
Base	Yes	Sepolia	Full EVM
Optimism	Yes	Sepolia	Full EVM
Lux	Yes	Testnet, Devnet	EVM + Platform + X-Chain
Solana	Yes	Devnet	Solana JSON-RPC
Bitcoin	Yes	Testnet	Bitcoin Core RPC

Compute Units

Each RPC method costs a different number of compute units (CU):

Method	CU Cost
`eth_blockNumber`	1
`eth_getBalance`	2
`eth_call`	5
`eth_getTransactionReceipt`	3
`eth_getLogs`	10-100
`debug_traceTransaction`	50
`trace_block`	100

Batch Requests

Send multiple RPC calls in a single HTTP request:

curl -X POST https://api.bootno.de/v1/rpc/ethereum/mainnet \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '[
    {"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1},
    {"jsonrpc":"2.0","method":"eth_gasPrice","params":[],"id":2},
    {"jsonrpc":"2.0","method":"net_version","params":[],"id":3}
  ]'