BNB Chain RPC — Free Endpoint & Developer Guide

BNB Chain is a high-throughput EVM chain powering the broader Binance ecosystem. This guide shows how to connect to it through MoltNode's free BNB Chain RPC endpoint — no API key, no signup, just one clean URL.

What is BNB Chain

BNB Chain is an EVM-compatible layer-1 designed for high throughput and low fees, supporting a large ecosystem of DeFi protocols, exchanges, games, and consumer apps. Because it is EVM-compatible, the contracts, libraries, and eth_* JSON-RPC methods you use on Ethereum carry over directly — you deploy the same Solidity and call the same RPC methods, just against a different network.

The native gas token on BNB Chain is BNB, and its EVM chainId is 56. Whether you are bridging assets, running a trading bot, or building a front end, the BNB Chain integration follows the familiar EVM pattern: pick the endpoint, set chainId 56, and use the standard JSON-RPC interface.

BNB Chain RPC endpoint on MoltNode

MoltNode gives BNB Chain a single, memorable URL:

https://moltnode.ag/bnb

That URL is a live BNB Chain RPC endpoint. There is no API key to manage, no signup, and CORS is open so browser-based dApps can call it directly. Send standard JSON-RPC 2.0 requests as an HTTP POST with a JSON body and you get JSON-RPC responses back.

The URL is dual-purpose. A GET to https://moltnode.ag/bnb in a browser returns a human-readable page about the chain; a POST to the same URL returns machine-readable BNB Chain JSON-RPC. One link works for both people and programs.

Quick test with curl

To confirm the free BNB Chain RPC is live, ask for the latest block number using eth_blockNumber:

curl -s https://moltnode.ag/bnb \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_blockNumber","params":[]}'

You will get a JSON-RPC response with the current block height as a hex string, such as {"jsonrpc":"2.0","id":1,"result":"0x..."}.

Use it from your code

Any Ethereum client works because the endpoint speaks plain JSON-RPC. Point it at the BNB Chain node URL and start making calls. Here is an example using ethers:

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://moltnode.ag/bnb");

const block = await provider.getBlockNumber();
console.log("Latest BNB Chain block:", block);

The same URL drops into viem, web3.py, wagmi, or any wallet that supports custom networks — add it with chainId 56 and symbol BNB and you are connected.

Reliability & failover

Behind moltnode.ag/bnb sits a pool of upstream providers tried in order. Requests go first to dRPC, and if that upstream is unreachable or errors, MoltNode automatically fails over to bloXroute, which also handles sendRawTransaction for transaction submission. You never see the switch — you just get a response. The upstream provider keys live server-side and are never exposed to clients, so you get robust infrastructure without holding any credentials.

There is no hard rate limit, but the endpoint is a shared resource. Please use it responsibly: cache where possible, avoid tight polling loops, and switch to a dedicated provider for heavy production workloads. Treating the BNB Chain JSON-RPC fairly keeps it fast and free for everyone.

For humans and agents

MoltNode is designed to be discoverable by both developers and autonomous software. A browser GET on https://moltnode.ag/bnb renders a readable page; a POST returns BNB Chain JSON-RPC. For programmatic discovery, agents and scripts can read the machine-readable catalog at https://moltnode.ag/api/chains to find BNB Chain's slug, chainId, and endpoint, with a plain-text overview at https://moltnode.ag/llms.txt. An AI agent can discover the chain, confirm chainId 56, and start issuing eth_* calls with no human in the loop.

Closing

For a free BNB Chain RPC that just works, point your client at https://moltnode.ag/bnb. No key, no signup, open CORS, and automatic failover across upstreams — whether you are building a dApp with viem or ethers, scripting in web3.py, adding a custom network to your wallet, or running an AI agent against the BNB Chain node.