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Cronos blockchain logo - Free RPC endpoints available

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%
2
24/7
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.

Mainnet

Mainnet
Explorer
JSON-RPC
https://cronos-mainnet.gateway.tatum.io

Testnet

Testnet
Explorer
JSON-RPC
https://cronos-testnet.gateway.tatum.io

* Rate limit enabled - perfect for testing and development. For production, we recommend to Upgrade.

Ready for production?

Get 200 requests/second, priority support and advanced blockchain features.

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

Upgrade
Get Free API Key

Increase your limit and access all Cronos features in Tatum Development Platform.

Get API Key How to authenticate

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.

Get Token Exchange Rates

Check exchange rates for tokens and fiat on Cronos.

1 CRO=? USD

Check Cronos Malicious Address

Verify if an address on Cronos is flagged as malicious.

0x1a2b...3c4d
Flagged
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.

Real-time Alerts for Cronos

Receive instant webhooks for any event on Cronos.

nowNew token transfer detected
200 OK
5s agoIncoming USDT transaction
200 OK
10s agoSmart contract executed
200 OK

Notification Types on Cronos

Discover incoming and outgoing transaction events for Cronos addresses.

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.

Tatum Blog & Updates

Learn More About Cronos

Discover guides, tutorials, and insights about Cronos development

Cronos

What's new at Tatum on Cronos?

Mar 11, 2024 Added

Cronos (new RPC Offering)

We're excited to announce the launch of Cronos.

Feb 20, 2024 Improved

Dashboard - Extended Notifications Builder Support

The Notification Builder in dashboard now supports creating notifications for Tezos, Flare, Holesky & Cronos, directl...

FAQ

Frequently Asked Questions

Everything you need to know about Cronos RPC endpoints

Quick Answer: 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. Our free tier provides 5 requests per minute with no registration required, perfect for testing and development. For production applications, upgrade to Tatum Premium for 200 requests per second and enterprise-grade reliability.

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.

When should I upgrade to Premium?

Consider upgrading to Premium when you're moving to production, need higher rate limits (200 req/sec), require 99.9% uptime SLA, want access to archive nodes for historical data, or need advanced features like batch RPC calls, debug/trace methods, and priority support.

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 happens if I exceed the free tier rate limit for Cronos RPC?

If you exceed 5 requests per minute on the free tier Cronos RPC, you'll receive an HTTP 429 (Too Many Requests) error. This is a standard rate limiting response. To avoid this, you can upgrade to Tatum Premium which offers 200 requests per second with no daily limits, perfect for production applications.

Can I use these Cronos RPC endpoints with MetaMask?

Yes! You can configure MetaMask to use our Cronos RPC endpoints. Simply copy the endpoint URL from above, go to MetaMask Settings > Networks > Add Network (or edit existing), and paste the RPC URL. This works with all EVM-compatible blockchains including Cronos.

Are the Cronos RPC endpoints secure?

Yes, all our Cronos RPC endpoints use HTTPS encryption and follow enterprise-grade security practices. They're powered by Tatum's infrastructure which maintains 99.99% uptime and is trusted by thousands of developers worldwide.

What's the difference between Cronos mainnet and testnet RPC endpoints?

Mainnet endpoints connect to the live Cronos blockchain where real transactions occur with real assets. Testnet endpoints connect to a separate testing network with free test tokens. Always test your dApp on Cronos testnet before deploying to mainnet.

How do I troubleshoot Cronos RPC connection errors?

If you're experiencing connection errors with Cronos RPC, check: 1) The RPC endpoint URL is correct, 2) You're not exceeding rate limits (5 req/min for free tier), 3) Your network allows HTTPS connections, 4) The Cronos network is currently operational. For persistent issues, check our status page or contact support.

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.
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