Mainnet
Mainnet JSON-RPC
https://kusama-mainnet.gateway.tatum.io
Substrate API
https://kusama-mainnet.gateway.tatum.io/substrateapi
Free Kusama RPC (KSM)
Explore Kusama, an experimental and fast-moving blockchain network designed for innovation in decentralized applications and governance.
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RPC Gateway
Connect to Kusama RPC
Access reliable, enterprise-grade RPC endpoints that power your dApp with ultra-low latency and 99.9% uptime.
Connect to Kusama Gateway
Make your first RPC call on Kusama'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 Kusama features in Tatum Development Platform.
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 Kusama Data Insights
Complete on-chain data access for Kusama. Query wallets, tokens, NFTs, and transaction history with lightning-fast APIs - no need to run your own nodes.
About Kusama
Kusama is a network built as a risk-taking, fast-moving 'canary in the coal mine' for its cousin Polkadot. As it is built on top of the same infrastructure, Kusama often acts as a final testing ground for new features before they are launched on Polkadot. Unlike true TestNets, however, the Kusama KSM native token does have economic value. This incentive encourages paricipants to maintain this robust and performant structure for the benefit of the community.
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Learn More About Kusama
Discover guides, tutorials, and insights about Kusama development
FAQ
Frequently Asked Questions
Everything you need to know about Kusama RPC endpoints
What is Kusama RPC?
Kusama RPC (Remote Procedure Call) is an interface that allows developers to interact with the Kusama blockchain. It enables you to read data, send transactions, and deploy smart contracts programmatically using standard JSON-RPC methods.
How do I connect to Kusama 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 Kusama 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 Kusama RPC free forever?
Yes! Our free tier Kusama 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 Kusama 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.