Citrea RPC Endpoint

Flat-rate Citrea RPC provider and Citrea RPC node access: free tier, no KYC, HTTP. Citrea mainnet chain ID 4114.

Citrea is a Bitcoin ZK rollup that uses Bitcoin for settlement and data availability while exposing an EVM-compatible execution environment on chain ID 4114. cBTC pays gas.

About Citrea

Citrea is built as a zero-knowledge rollup secured by Bitcoin. Its execution layer is EVM-compatible and targets the Pectra EVM feature set, so Solidity contracts and common Ethereum tooling can be used without changing the settlement model.

The native gas token is Citrea Bitcoin (cBTC), which uses 18 decimals in the EVM environment. Standard eth_* JSON-RPC methods are available; check Citrea's bridge documentation before moving BTC or other assets into the rollup.

Common Use Cases on Citrea

• Bitcoin-settled DeFi and applications
• Solidity contracts using EVM tooling
• BTC-denominated execution and settlement
• Bitcoin ecosystem wallets and indexers

Citrea Ecosystem

Citrea's ecosystem is built around bringing programmable applications to Bitcoin, using BTC as the settlement asset while exposing an EVM execution environment for Solidity developers.

Citrea Mainnet RPC URL (HTTP)

Citrea WebSocket RPC URL

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

Quick Start: Connect to Citrea

cURL

curl -X POST https://rpc.swiftnodes.io/rpc/citrea?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/citrea?key=YOUR_API_KEY"
);

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

viem

import { createPublicClient, http } from "viem";

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

const blockNumber = await client.getBlockNumber();

web3.py

from web3 import Web3

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

Add Citrea to MetaMask

Bridging to Citrea

Use Citrea's official bridge and supported Bitcoin routes; verify asset support, confirmation requirements and finality before transferring funds.

Features of SwiftNodes for Citrea

• 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 133 supported chains and their testnets, including Citrea

Rate Limits

Frequently Asked Questions: Citrea

Related Bitcoin chains

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