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RPC Endpoints

This guide covers EVM RPC endpoints for Monolythium.

Public Endpoints​

Sprintnet​

ServiceURL
JSON-RPChttps://rpc.sprintnet.monolythium.com:8545
WebSocketwss://rpc.sprintnet.monolythium.com:8546

Testnet​

ServiceURL
JSON-RPChttps://rpc.testnet.monolythium.com:8545
WebSocketwss://rpc.testnet.monolythium.com:8546

Mainnet​

ServiceURL
JSON-RPChttps://rpc.monolythium.com:8545
WebSocketwss://rpc.monolythium.com:8546

!!! note "Endpoint Availability" Public endpoints will be announced before each network launch.

Supported Methods​

Standard Ethereum Methods​

MethodSupported
eth_chainIdYes
eth_blockNumberYes
eth_getBalanceYes
eth_getTransactionCountYes
eth_sendRawTransactionYes
eth_callYes
eth_estimateGasYes
eth_getTransactionReceiptYes
eth_getBlockByNumberYes
eth_getBlockByHashYes
eth_getLogsYes
eth_subscribeYes (WebSocket)

Additional Methods​

MethodDescription
eth_feeHistoryFee history data
debug_traceTransactionTransaction tracing
eth_getProofState proofs

Configuration Examples​

ethers.js​

const { ethers } = require('ethers');

// HTTP
const provider = new ethers.JsonRpcProvider(
  'https://rpc.sprintnet.monolythium.com:8545'
);

// WebSocket
const wsProvider = new ethers.WebSocketProvider(
  'wss://rpc.sprintnet.monolythium.com:8546'
);

web3.js​

const Web3 = require('web3');

const web3 = new Web3('https://rpc.sprintnet.monolythium.com:8545');

Hardhat​

module.exports = {
  networks: {
    sprintnet: {
      url: 'https://rpc.sprintnet.monolythium.com:8545',
      chainId: 262146
    }
  }
};

Foundry​

[rpc_endpoints]
sprintnet = "https://rpc.sprintnet.monolythium.com:8545"

Running Your Own Endpoint​

Enable EVM RPC in your node:

Configuration​

Edit ~/.monod/config/app.toml:

[json-rpc]
enable = true
address = "0.0.0.0:8545"
ws-address = "0.0.0.0:8546"

# API namespaces
api = "eth,net,web3,txpool,debug"

# Gas cap for eth_call
gas-cap = 50000000

# EVM timeout
evm-timeout = "5s"

# Transaction fee cap
txfee-cap = 1

# Filter settings
filter-cap = 200
logs-cap = 10000
block-range-cap = 1000

Restart Node​

sudo systemctl restart monod

Verify​

curl -X POST -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":1}' \
  http://localhost:8545

Rate Limits​

Public endpoints may have rate limits:

LimitValue
Requests per second~100
Requests per minute~1000
Concurrent connections~100

For heavy usage, run your own node.

WebSocket Subscriptions​

const provider = new ethers.WebSocketProvider(
  'wss://rpc.sprintnet.monolythium.com:8546'
);

// Subscribe to new blocks
provider.on('block', (blockNumber) => {
  console.log('New block:', blockNumber);
});

// Subscribe to logs
const filter = {
  address: '0x...',
  topics: [ethers.id('Transfer(address,address,uint256)')]
};
provider.on(filter, (log) => {
  console.log('Log:', log);
});

Troubleshooting​

Connection Refused​

  • Check endpoint URL is correct
  • Verify network connectivity
  • Try alternative endpoint

Rate Limited​

  • Reduce request frequency
  • Use batch requests
  • Run your own node

Timeout​

  • Increase timeout settings
  • Try simpler queries
  • Check node health

FAQ​

What's the difference between HTTP and WebSocket?

HTTP is request-response. WebSocket maintains a connection for subscriptions and real-time updates.

Can I use Infura/Alchemy?

No. Those are for Ethereum. Use Monolythium RPC endpoints.

How do I get more throughput?

Run your own node or contact for enterprise solutions.