Cronos RPC Endpoint

Flat-rate Cronos RPC provider and Cronos RPC node access: free tier, no KYC, HTTP & WebSocket. Cronos mainnet chain ID 25.

Cronos is an EVM-compatible Layer 1 built with the Cosmos SDK and a Tendermint-based consensus, backed by Crypto.com. It offers fast deterministic finality, low fees, and IBC interoperability with the broader Cosmos ecosystem.

About Cronos

Cronos mainnet launched in November 2021 as an Ethereum-compatible chain running an Ethermint EVM module on top of the Cosmos SDK. It uses a Tendermint-derived proof-of-authority/proof-of-stake consensus, producing blocks roughly every 0.4 seconds (measured at ~0.42s over a million-block window in September 2026), each final as soon as it is committed.

Because it is built on Cosmos, Cronos connects to other Cosmos chains through the Inter-Blockchain Communication (IBC) protocol while still letting developers deploy Solidity contracts with standard Ethereum tooling. It targets DeFi, GameFi, and consumer applications, aided by its integration with the Crypto.com app.

Common Use Cases on Cronos

• DeFi protocols and DEXes
• GameFi and NFT applications
• Low-fee token transfers and payments
• Cross-chain transfers via IBC
• Crypto.com app integrations

Cronos Ecosystem

Notable projects include VVS Finance, Ferro, Tectonic, and Crypto.com's own DeFi and NFT integrations.

Cronos Mainnet RPC URL (HTTP)

Cronos WebSocket RPC URL

Quick Start: Connect to Cronos

cURL

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

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

viem

import { createPublicClient, http } from "viem";

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

const blockNumber = await client.getBlockNumber();

web3.py

from web3 import Web3

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

Add Cronos to MetaMask

Bridging to Cronos

Assets bridge in via the Cronos bridge and third-party routes such as cBridge (Celer) and the IBC protocol for Cosmos-based assets.

Features of SwiftNodes for Cronos

• 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 and WebSocket support
• One API key works across all 75+ supported chains, including Cronos

Rate Limits

Frequently Asked Questions: Cronos

Cronos guides from the blog

• Which Chains Stopped? 43 Days of Block Timestamps Across 110 ChainsBetween August 25 and October 6, 2026, ten of 110 chains we scanned stopped producing blocks for 10 minutes or more. TAC was down 10.6 days, Neutron 77.75 hours, Cosmos Hub 24.8 hours, Cronos 17 hours. The full list, the method, and the raw data.
• Cronos RPC: A Developer's GuideHow to use Cronos EVM over JSON-RPC — chain ID 25, ~0.42 second blocks with instant finality, a 10,000-block eth_getLogs cap, historical state pruned after ~100 blocks, and no debug or trace namespace.

Related EVM chains

Explore RPC endpoints for other EVM networks on SwiftNodes: