Kusama RPC Endpoint
Flat-rate Kusama RPC provider and Kusama RPC node access: free tier, no KYC, HTTP & WebSocket.
https://rpc.swiftnodes.io/rpc/kusama?key=YOUR_API_KEYwss://rpc.swiftnodes.io/ws/kusama?key=YOUR_API_KEYKusama is Polkadot's canary network — a fully functional, value-bearing chain that shares Polkadot's codebase but moves faster and with lower economic stakes. Teams use it to test parachains, runtime upgrades, and governance before deploying to Polkadot.
kusamaKusama on the SwiftNodes fleet, right now
Status and latency from our health checks, refreshed about every 5 minutes. Uptime history. Network status
About Kusama
Kusama launched in 2019 from the same Substrate framework as Polkadot, using GRANDPA finality and BABE block production with ~6-second blocks. Its governance and staking parameters are deliberately faster than Polkadot's, making it a real-world proving ground rather than a throwaway testnet — KSM has market value and Kusama secures live applications.
Like Polkadot, Kusama is a relay chain that provides shared security to connected parachains (now via coretime). Developers interact with Kusama and its parachains over the Substrate JSON-RPC interface and WebSocket subscriptions.
Common Use Cases on Kusama
- Testing parachains and runtime upgrades before Polkadot
- KSM staking and nomination
- Fast-moving on-chain governance (OpenGov)
- Securing experimental parachains via coretime
- Early-stage launches that want real economic conditions
Kusama Ecosystem
Kusama parachains include Karura, Khala, Bifrost, and Shiden, among others. It shares core technology and many teams with the Polkadot ecosystem.
Kusama Mainnet RPC URL (HTTP)
https://rpc.swiftnodes.io/rpc/kusama?key=YOUR_API_KEYKusama WebSocket RPC URL
wss://rpc.swiftnodes.io/ws/kusama?key=YOUR_API_KEYQuick Start: Connect to Kusama
cURL
curl -X POST https://rpc.swiftnodes.io/rpc/kusama?key=YOUR_API_KEY \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"getHealth","id":1}'Note: Kusama uses its own RPC methods. Refer to the official Kusama documentation for available methods.
Bridging to Kusama
Cross-Consensus Messaging (XCM) moves assets between Kusama and its parachains. Bridges via Snowbridge and third parties connect Kusama-ecosystem assets to Ethereum and beyond.
Features of SwiftNodes for Kusama
- Load-balanced across multiple upstream nodes wherever a chain has more than one, with automatic failover
- Health-checked every 2 minutes with automatic failover
- Free tier available — no credit card or KYC required
- Flat-rate monthly pricing with no per-request fees
- HTTP and WebSocket support
- One API key works across all 75+ supported chains, including Kusama
Rate Limits
| Plan | Price | HTTP req/s | WS msg/s |
|---|---|---|---|
| Free | $0/mo | 2 | 1 |
| Starter | $49/mo | 50 | 25 |
| Growth | $89/mo | 150 | 75 |
| Scale | $149/mo | 300 | 150 |
| Pro | $249/mo | 500 | 250 |
Frequently Asked Questions: Kusama
Does Kusama have an EVM chain ID?
Kusama itself is non-EVM (Substrate-based) and identifies by network name, not an EVM chain ID. Some Kusama parachains like Shiden are EVM-compatible and do have their own chain IDs.
How is Kusama different from Polkadot?
Kusama shares Polkadot's codebase but runs with faster governance and lower bonding requirements, serving as a canary network where teams test before deploying to Polkadot. KSM is its own token with real value.
What RPC interface does Kusama use?
Kusama uses the Substrate JSON-RPC API over HTTP and WebSocket (state_*, chain_*, author_* methods, plus subscriptions). Use the Polkadot-JS API or compatible SDKs rather than EVM tooling.
Kusama guides from the blog
- Kusama RPC: A Developer's Guide After the Asset Hub MoveSince October 2025, Kusama balances live on Asset Hub, not the relay chain. What the relay RPC still serves, finality, runtime upgrades and code.
Related Polkadot chains
Explore RPC endpoints for other Polkadot networks on SwiftNodes:
Ready to start building on Kusama? Connect your wallet and get a free API key in 30 seconds. No email or KYC required.