B2 Network RPC Endpoint

Flat-rate B2 Network RPC provider and B2 Network RPC node access: free tier, no KYC, HTTP. B2 Network mainnet chain ID 223.

B2 Network is a Bitcoin layer 2 with an EVM-compatible rollup layer. Access B2 Network RPC endpoints with SwiftNodes.

B2 Network Mainnet RPC URL (HTTP)

B2 Network WebSocket RPC URL

Not available for B2 Network right now: none of its upstreams currently accepts a subscription in our health checks. Poll the HTTP endpoint above instead.

Quick Start: Connect to B2 Network

cURL

curl -X POST https://rpc.swiftnodes.io/rpc/bsquared?key=YOUR_API_KEY \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

ethers.js

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider(
  "https://rpc.swiftnodes.io/rpc/bsquared?key=YOUR_API_KEY"
);

const blockNumber = await provider.getBlockNumber();
console.log("B2 Network block:", blockNumber);

viem

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://rpc.swiftnodes.io/rpc/bsquared?key=YOUR_API_KEY"),
});

const blockNumber = await client.getBlockNumber();

web3.py

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("https://rpc.swiftnodes.io/rpc/bsquared?key=YOUR_API_KEY"))
print("B2 Network block:", w3.eth.block_number)

Add B2 Network to MetaMask

Features of SwiftNodes for B2 Network

• Load-balanced across multiple upstream nodes wherever a chain has more than one, with automatic failover
• Health-checked every 2 minutes with automatic failover
• Free tier available — no credit card or KYC required
• Flat-rate monthly pricing with no per-request fees
• HTTP support (WebSocket not available for this chain right now)
• One API key works across all 75+ supported chains, including B2 Network

Rate Limits

Related L2 & rollup chains

Explore RPC endpoints for other L2 & rollup networks on SwiftNodes: