Mainnet
Mainnet JSON-RPC
https://cronos-mainnet.gateway.tatum.io
Free Cronos RPC (CRO)
Explore Cronos, an EVM-compatible blockchain for DeFi and NFTs. Benefit from low-cost transactions and cross-chain interoperability.
99.99%
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FREE
RPC Gateway
Connect to Cronos RPC
Access reliable, enterprise-grade RPC endpoints that power your dApp with ultra-low latency and 99.9% uptime.
Connect to Cronos Gateway
Make your first RPC call on Cronos's Blockchain Gateway.
Ready for production?
Get 200 requests/second, priority support, and advanced features for production apps.
Global Load Balancer
Route to nearest node
Batch RPC Calls
Multiple requests at once
Archive Nodes
Historical blockchain data
Debug & Trace
Advanced debugging
Advanced Analytics
Usage & performance
Bring Your Own RPC
Custom RPC gateways
Get Free API Key
Increase your limit and access all Cronos features in Tatum Development Platform.
Estimate Gas on Cronos
Calculate the optimal gas fee for any transaction on Cronos.
Smart Contract Tools on Cronos
Deploy, create, and interact with smart contracts on Cronos.
Accessible to Everyone
No signup. No paywalls. Just RPC that works. Great ideas come from everywhere.
Our Mission
With love by Tatum
Blockchain Data
Indexed Cronos Data Insights
Complete on-chain data access for Cronos. Query wallets, tokens, NFTs, and transaction history with lightning-fast APIs - no need to run your own nodes.
Blockchain Notifications
Real-time Cronos Alerts
Real-time webhooks for Cronos events. Stop polling the blockchain - get instant alerts for transactions, smart contract events, and wallet activities.
About Cronos
The Cronos RPC documentation provides developers with a comprehensive guide to interact programmatically with Cronos, an EVM-compatible blockchain. This guide details the available API endpoints for querying blockchain data, submitting transactions, and managing smart contracts. Cronos is optimized for decentralized finance (DeFi) and NFT applications, offering fast transaction speeds and low costs. With support for the Cosmos ecosystem through IBC, developers can easily integrate cross-chain functionality using the detailed RPC interface.
FAQ
Frequently Asked Questions
Everything you need to know about Cronos RPC endpoints
What is Cronos RPC?
Cronos RPC (Remote Procedure Call) is an interface that allows developers to interact with the Cronos blockchain. It enables you to read data, send transactions, and deploy smart contracts programmatically using standard JSON-RPC methods.
How do I connect to Cronos using these RPC endpoints?
Simply copy the RPC endpoint URL from above and configure it in your Web3 library (ethers.js, web3.js), wallet (MetaMask, Trust Wallet), or development tool (Hardhat, Truffle). The endpoint works immediately with no registration required for the free tier.
What are the rate limits for free Cronos RPC?
Free tier RPC endpoints are limited to 5 requests per minute. This is perfect for testing and development. For production applications, we recommend upgrading to Tatum Premium which offers 200 requests per second with no daily limits.
Is Cronos RPC free forever?
Yes! Our free tier Cronos RPC endpoints are free forever with 5 requests per minute. This tier is perfect for learning, testing, and small projects. There are no hidden fees or time limits on the free tier.
What's the difference between mainnet and testnet?
Mainnet is the live Cronos blockchain where real transactions occur with real assets. Testnet is a separate network used for testing and development with free test tokens. Always test your dApp on testnet before deploying to mainnet.
Can I use these endpoints in production?
Free tier endpoints can be used in production for low-traffic applications (under 5 req/min). For production apps with higher traffic, we strongly recommend Tatum Premium for guaranteed uptime, faster rate limits, and enterprise SLA.