Mainnet
Mainnet JSON-RPC
https://casper-mainnet.gateway.tatum.io
Free Casper RPC (CSPR)
Explore Casper, a blockchain optimized for enterprise solutions with upgradable smart contracts. Build decentralized applications using its RPC gateway.
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FREE
RPC Gateway
Connect to Casper RPC
Access reliable, enterprise-grade RPC endpoints that power your dApp with ultra-low latency and 99.9% uptime.
Connect to Casper Gateway
Make your first RPC call on Casper's Blockchain Gateway.
* 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
Get Free API Key
Increase your limit and access all Casper features in Tatum Development Platform.
Smart Contract Tools on Casper
Deploy, create, and interact with smart contracts on Casper.
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 Casper Data Insights
Complete on-chain data access for Casper. Query wallets, tokens, NFTs, and transaction history with lightning-fast APIs - no need to run your own nodes.
About Casper
The Casper RPC documentation provides developers with a comprehensive guide to interact with the Casper network programmatically. Casper is designed to provide enterprise-grade scalability, security, and upgradability for smart contracts, using its innovative proof-of-stake (PoS) consensus mechanism. The documentation includes API endpoints for querying blockchain data, submitting transactions, and managing smart contracts. Developers can leverage Casper’s upgradable smart contracts to build decentralized applications that meet evolving business needs.
FAQ
Frequently Asked Questions
Everything you need to know about Casper RPC endpoints
What is Casper RPC?
Casper RPC (Remote Procedure Call) is an interface that allows developers to interact with the Casper blockchain. It enables you to read data, send transactions, and deploy smart contracts programmatically using standard JSON-RPC methods.
How do I connect to Casper 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 Casper 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 Casper RPC free forever?
Yes! Our free tier Casper 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 Casper 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.