opBNB RPC Endpoints

Mainnet

Testnet

Chain ID
Family: EVM

HTTPS

https://api-opbnb-mainnet.n.dwellir.com/<your-api-key>

WSS

wss://api-opbnb-mainnet.n.dwellir.com/<your-api-key>

Quick Start

BASH

curl -sS -X POST https://api-opbnb-mainnet.n.dwellir.com/<your-api-key> \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

JAVASCRIPT

import { JsonRpcProvider } from 'ethers';

const provider = new JsonRpcProvider('https://api-opbnb-mainnet.n.dwellir.com/<your-api-key>');
const latest = await provider.getBlockNumber();
console.log('block', latest);

PYTHON

import requests

url = 'https://api-opbnb-mainnet.n.dwellir.com/<your-api-key>'
payload = { 'jsonrpc': '2.0', 'id': 1, 'method': 'eth_blockNumber', 'params': [] }
resp = requests.post(url, json=payload)
print(resp.json())

package main

import (
  "bytes"
  "fmt"
  "net/http"
  "io/ioutil"
)

func main() {
  url := "https://api-opbnb-mainnet.n.dwellir.com/<your-api-key>"
  payload := []byte("{\"jsonrpc\":\"2.0\",\"id\":1,\"method\":\"eth_blockNumber\",\"params\":[]}")
  resp, err := http.Post(url, "application/json", bytes.NewBuffer(payload))
  if err != nil { panic(err) }
  defer resp.Body.Close()
  body, _ := ioutil.ReadAll(resp.Body)
  fmt.Println(string(body))
}

opBNB is a high-performance layer-2 network for BNB Chain, built on the OP Stack. It delivers low-cost, high-throughput EVM-compatible transactions while inheriting security from BNB Smart Chain, making it a strong fit for high-frequency DeFi, gaming, and consumer applications.

Shared Node Pricing

How many calls do you make per month?

/ month

Growth

$299

/month

500 Responses /sec
Pay in Crypto
Dedicated Account Manager

CHOOSE GROWTH

opBNB Unlimited Node

Unmetered requests within your tier
Five tiers from 25 to 1,000 RPS
No API credits, no overages
Pay in Crypto
HTTP & Websocket APIs
Trace APIs
Debug APIs
Same endpoint URL and API key
Self-serve in the dashboard
Fixed monthly invoice

From $119/month

SEE UNLIMITED NODE PRICING

opBNB Dedicated Node Cluster

Unlimited RPS & Responses
HTTP & Websocket APIs
Trace APIs
Debug APIs
Pay in Crypto
Dedicated Account Manager
Tailored load balancing
Access to Engineering teams
Global data centers

$5880/month

TELEGRAM CONTACT SALES

Developer Resources

FAQs

What is the Dwellir opBNB RPC URL?

Do you support WebSockets on opBNB?

Do you support archive data on opBNB?

How do I migrate from public opBNB RPC endpoints?

What are the opBNB Chain IDs and network details?

What SDKs can I use with Dwellir's opBNB endpoints?

How do opBNB transaction fees compare to BSC, and what are the cost components?

opBNB fees are dramatically lower than BSC—targeting under $0.001 per transfer vs. BSC's variable fees. opBNB costs have two components: 1) L2 execution fee: Covers computation and storage on opBNB (very low due to high throughput), 2) L1 posting cost: Shared cost for batching transaction data to BSC for verification. The L1 component is amortized across many transactions in a batch, making individual transactions cheap. With ~1 second blocks and 4,000+ TPS capacity, opBNB is optimized for high-frequency, low-value transactions like gaming and micropayments.

How does data availability work on opBNB and what are the planned improvements?

Currently, opBNB posts transaction data as calldata to BSC (its L1). The BNB Chain roadmap includes integration with BNB Greenfield for cheaper data availability—similar to how Ethereum L2s use EIP-4844 blobs. Planned upgrades aim to reduce fees by 5-10x through: 1) Moving data to Greenfield's decentralized storage, 2) Improved compression, 3) Higher L2 gas limits (doubled to 200M gas/second in 2024). These changes happen at the protocol level; your application code won't need modifications to benefit.

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