Kusama RPC Endpoint

Fast, flat-rate Kusama RPC node provider — free tier, no KYC, HTTP & WebSocket.

Kusama 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.

Network: Kusama

Type: Non-EVM

Slug: kusama

Native token: KSM (Kusama)

Block time: ~6 seconds

Finality: GRANDPA deterministic finality (typically within seconds)

Mainnet: 2019 (Kusama network launch)

Category: Layer 0 relay chain (Substrate, nominated proof-of-stake)

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, Moonriver (Moonbeam's canary), Khala, Bifrost, and Shiden, among others. It shares core technology and many teams with the Polkadot ecosystem.

HTTP Endpoint

https://rpc.swiftnodes.io/rpc/kusama?key=YOUR_API_KEY

WebSocket Endpoint

wss://rpc.swiftnodes.io/ws/kusama?key=YOUR_API_KEY

Quick 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

Multiple load-balanced upstream nodes for high availability
Health-checked every 60 seconds 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 Moonriver 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.

Ready to start building on Kusama? Connect your wallet and get a free API key in 30 seconds. No email or KYC required.