Kusama Asset Hub Migration: What It Means for Developers and Validators

On October 7, 2025, Kusama completed its migration to the Asset Hub, improving scalability, lowering costs, and streamlining network operations. This sets the stage for Polkadot’s upcoming migration.

On October 7, 2025, Kusama successfully completed its migration from the Relay Chain to the Kusama Asset Hub - a transformative upgrade that enhances scalability, reduces costs, and streamlines operations across the network. This milestone sets the stage for Polkadot's upcoming migration and signals a new era of efficiency for developers, node runners, and validators.

Key Benefits of the Kusama Asset Hub Migration

Lower Transaction Fees: Transaction costs have dropped approximately 5x, from 0.00053 KSM to 0.00009 KSM.
Reduced Minimum Balance: Minimum balance requirements are now 10x lower, making assets more accessible.
Unified Access: Users enjoy seamless integration across KSM, assets, staking, and governance.
Multi-Token Support: Supports a wide range of tokens including USDT, USDC, DOT, and more.
Fee Payment Flexibility: Users can pay transaction fees using any supported token.
Preserved Transaction History: Transaction history is retained on the Relay Chain, ensuring continuity.

What This Means for Developers and Node Runners

With the migration complete, developers and validators need to align their infrastructure with the new Asset Hub environment:

Asset Hub RPC

Switch to Asset Hub Kusama RPC endpoints for compatibility with the new network structure.

OnFinality provides reliable public RPC endpoints - perfect for testing and small-scale access.

https://assethub-kusama.api.onfinality.io/public
wss://assethub-kusama.api.onfinality.io/public-ws

For production workloads, unlock private high-performance RPC access to ensure speed, reliability, and uptime.

Access Asset Hub RPC Now

Asset Hub Indexing

Update your indexing services to reflect the new data structures and transaction formats.
OnFinality’s Asset Hub Indexing solutions ensure your apps and analytics continue running smoothly.

Get started with Asset Hub Indexing

Validator Nodes

Future validator transactions, except for setting session keys, will be performed in Kusama Asset Hub
You will need to bridge KSM back to the Kusama Relay Chain to set session keys

Next Steps for Your Infrastructure

Developers: Update your apps to interact with Asset Hub Kusama RPC and ensure compatibility with new network features.
Indexers: Connect to Asset Hub Indexing for full historical and real-time data coverage.
Validators & Node Runners: Update your validator auto-payout tool to use OnFinality's Asset Hub Kusama endpoint

Final Thoughts

The migration to Asset Hub Kusama went smoothly, setting a solid precedent for the upcoming Polkadot Asset Hub migration. Developers, validators, and node runners should take note and prepare to leverage the same benefits - lower fees, multi-token support, and improved infrastructure - once they roll out on Polkadot.

About OnFinality

OnFinality is a blockchain infrastructure platform that saves web3 builders time and makes their lives easier. OnFinality delivers scalable API endpoints, nodes, AI Agents, and indexers for the biggest blockchain networks and empowers developers to automatically test, deploy, scale and monitor their own blockchain nodes in minutes.

To date, OnFinality has served hundreds of billions of RPC requests, supports over 125 networks including Avalanche, BNB Chain, Cosmos, Polkadot, Ethereum, and Polygon, and is continuously expanding these mission-critical services so developers can build the decentralised future, faster!