Free Casper RPC (CSPR)

Explore Casper, a blockchain optimized for enterprise solutions with upgradable smart contracts. Build decentralized applications using its RPC gateway.

99.99%

24/7

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.

Mainnet

Explorer

JSON-RPC

https://casper-mainnet.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 Casper features in Tatum Development Platform.

Get API Key How to authenticate

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.

Get Token Exchange Rates

Check exchange rates for tokens and fiat on Casper.

1 CSPR=? USD

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

Quick Answer: 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. 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 Casper RPC?

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.

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

If you exceed 5 requests per minute on the free tier Casper 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 Casper RPC endpoints with MetaMask?

Yes! You can configure MetaMask to use our Casper 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 Casper.

Are the Casper RPC endpoints secure?

Yes, all our Casper 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 Casper mainnet and testnet RPC endpoints?

Mainnet endpoints connect to the live Casper 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 Casper testnet before deploying to mainnet.

How do I troubleshoot Casper RPC connection errors?

If you're experiencing connection errors with Casper 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 Casper 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 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.

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