API Reference
SupportStatusSign UpLogin
  1. Blockchain RPC

Kusama

Explore Kusama, an experimental and fast-moving blockchain network designed for innovation in decentralized applications and governance.

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.

– Related: 📚 Supported Blockchains • 🌐 RPC Nodes → Kusama • 🔗 Official Kusama Website

RPC Gateway for Kusama blockchain

↳ JSON-RPC
https://kusama-mainnet.gateway.tatum.io
📋 Methods
↳ Substrate API
https://kusama-mainnet.gateway.tatum.io/substrateapi
📋 Methods
↳ REST API
https://kusama-mainnet.gateway.tatum.io/v1
📋 Methods

Connect to Kusama and Fetch the Latest Block

This widget lets you instantly query the latest block height (or equivalent) for Kusama using a chain-specific RPC method like eth_blockNumber, getblockcount, or getBlockHeight. Useful for connectivity checks, uptime monitoring, or API testing.

Retrieve Kusama Node Status or Client Version via RPC

Use this pre-configured request to get version or status information for your connected Kusama node. Whether it's web3_clientVersion, getblockchaininfo, or chain-specific endpoints, the method is optimized for each supported blockchain.

Test Kusama RPC Methods in Postman

Explore and test Kusama blockchain methods instantly using our pre-configured Postman collection. Perfect for developers who want to experiment with Kusama RPC endpoints, validate API responses, or integrate Kusama into their applications.

How to use the Kusama Postman Collection

  1. Get your API key: Visit Tatum Dashboard to obtain your free API key
  2. Import the collection: Click the "Run in Postman" button below to import the Kusama collection
  3. Configure your environment: Update the gateway-api-key variable in the Tatum Gateway environment
  4. Start testing: Execute any Kusama RPC method and see real-time responses
▶️ Run in Postman

Available Kusama interfaces and methods

Each Kusama network and interface below exposes its own set of RPC methods, listed live from Tatum's RPC Gateway. Query these endpoints for any interface to explore what it supports:

  • /_methods – machine-readable list of interfaces and methods
  • /llms.txt – human- and AI-readable documentation context
Kusama Mainnet

JSON-RPC

Base URL: https://kusama-mainnet.gateway.tatum.io

Discovery: /_methods · /llms.txt

  • author_pendingExtrinsics
  • author_removeExtrinsic
  • author_submitAndWatchExtrinsic
  • author_submitExtrinsic
  • beefy_getFinalizedHead
  • grandpa_proveFinality
  • grandpa_roundState
  • chain_getBlock
  • chain_getBlockHash
  • chain_getFinalizedHead
  • chain_getHead
  • chain_getHeader
  • childstate_getKeys
  • childstate_getKeysPaged
  • childstate_getStorage
  • childstate_getStorageEntries
  • childstate_getStorageHash
  • childstate_getStorageSize
  • mmr_generateProof
  • mmr_root
  • mmr_verifyProof
  • mmr_verifyProofStateless
  • payment_queryFeeDetails
  • payment_queryInfo
  • rpc_methods
  • state_call
  • state_getChildReadProof
  • state_getKeys
  • state_getKeysPaged
  • state_getMetadata
  • state_getReadProof
  • state_getRuntimeVersion
  • state_getStorage
  • state_getStorageHash
  • state_getStorageSize
  • state_queryStorageAt
  • sync_state_genSyncSpec
  • system_health
  • system_chain
  • system_chainType
  • system_name
  • system_nodeRoles
  • system_properties
  • system_syncState
  • system_version

Substrate API · REST

Base URL: https://kusama-mainnet.gateway.tatum.io/substrateapi

Discovery: /_methods · /llms.txt

  • GET /accounts/{accountId}/asset-approvals
  • GET /accounts/{accountId}/asset-balances
  • GET /accounts/{accountId}/balance-info
  • GET /accounts/{accountId}/convert
  • GET /accounts/{accountId}/pool-asset-approvals
  • GET /accounts/{accountId}/pool-asset-balances
  • GET /accounts/{accountId}/proxy-info
  • GET /accounts/{accountId}/staking-info
  • GET /accounts/{accountId}/staking-payouts
  • GET /accounts/{accountId}/vesting-info
  • GET /accounts/{address}/validate
  • GET /accounts/compare
  • GET /blocks
  • GET /blocks/{blockId}
  • GET /blocks/{blockId}/extrinsics-raw
  • GET /blocks/{blockId}/extrinsics/{extrinsicIndex}
  • GET /blocks/{blockId}/header
  • GET /blocks/head
  • GET /blocks/head/header
  • GET /coretime/info
  • GET /coretime/leases
  • GET /coretime/overview
  • GET /coretime/regions
  • GET /coretime/renewals
  • GET /coretime/reservations
  • GET /node/network
  • GET /node/transaction-pool
  • GET /node/version
  • GET /pallets/{palletId}/consts
  • GET /pallets/{palletId}/consts/{constantItemId}
  • GET /pallets/{palletId}/dispatchables
  • GET /pallets/{palletId}/dispatchables/{dispatchableItemId}
  • GET /pallets/{palletId}/errors
  • GET /pallets/{palletId}/errors/{errorItemId}
  • GET /pallets/{palletId}/events
  • GET /pallets/{palletId}/events/{eventItemId}
  • GET /pallets/{palletId}/storage
  • GET /pallets/{palletId}/storage/{storageItemId}
  • GET /pallets/asset-conversion/liquidity-pools
  • GET /pallets/asset-conversion/next-available-id
  • GET /pallets/assets/{assetId}/asset-info
  • GET /pallets/foreign-assets
  • GET /pallets/nomination-pools/{poolId}
  • GET /pallets/nomination-pools/info
  • GET /pallets/on-going-referenda
  • GET /pallets/pool-assets/{assetId}/asset-info
  • GET /pallets/staking/progress
  • GET /pallets/staking/validators
  • GET /runtime/code
  • GET /runtime/metadata
  • GET /runtime/metadata/{metadataVersion}
  • GET /runtime/metadata/versions
  • GET /runtime/spec
  • GET /transaction/material
  • GET /transaction/material/{metadataVersion}
  • POST /contracts/ink/{address}/query
  • POST /transaction
  • POST /transaction/dry-run
  • POST /transaction/fee-estimate

REST API · REST

Base URL: https://kusama-mainnet.gateway.tatum.io/v1

Discovery: /_methods · /llms.txt

  • GET /{accountId}/asset-balances
  • GET /accounts/{accountId}/asset-approvals
  • GET /accounts/{accountId}/balance-info
  • GET /accounts/{accountId}/convert
  • GET /accounts/{accountId}/foreign-asset-balances
  • GET /accounts/{accountId}/pool-asset-approvals
  • GET /accounts/{accountId}/pool-asset-balances
  • GET /accounts/{accountId}/proxy-info
  • GET /accounts/{accountId}/staking-info
  • GET /accounts/{accountId}/staking-payouts
  • GET /accounts/{accountId}/validate
  • GET /accounts/{accountId}/vesting-info
  • GET /accounts/compare
  • GET /ahm-info
  • GET /blocks
  • GET /blocks/{blockNumber}
  • GET /blocks/{blockNumber}/extrinsics-raw
  • GET /blocks/{blockNumber}/extrinsics/{extrinsicIndex}
  • GET /blocks/{blockNumber}/header
  • GET /blocks/{blockNumber}/para-inclusions
  • GET /blocks/head
  • GET /blocks/head/header
  • GET /capabilities
  • GET /coretime/info
  • GET /coretime/leases
  • GET /coretime/overview
  • GET /coretime/regions
  • GET /coretime/renewals
  • GET /coretime/reservations
  • GET /health
  • GET /node/network
  • GET /node/transaction-pool
  • GET /node/version
  • GET /pallets/{palletId}/consts
  • GET /pallets/{palletId}/consts/{constantItemId}
  • GET /pallets/{palletId}/dispatchables
  • GET /pallets/{palletId}/dispatchables/{dispatchableItemId}
  • GET /pallets/{palletId}/errors
  • GET /pallets/{palletId}/errors/{errorItemId}
  • GET /pallets/{palletId}/events
  • GET /pallets/{palletId}/events/{eventItemId}
  • GET /pallets/{palletId}/storage
  • GET /pallets/{palletId}/storage/{storageItemId}
  • GET /pallets/asset-conversion/liquidity-pools
  • GET /pallets/asset-conversion/next-available-id
  • GET /pallets/assets/{assetId}/asset-info
  • GET /pallets/foreign-assets
  • GET /pallets/nomination-pools/{poolId}
  • GET /pallets/nomination-pools/info
  • GET /pallets/on-going-referenda
  • GET /pallets/pool-assets/{assetId}/asset-info
  • GET /pallets/staking/progress
  • GET /pallets/staking/validators
  • GET /runtime/code
  • GET /runtime/metadata
  • GET /runtime/metadata/v14
  • GET /runtime/metadata/versions
  • GET /runtime/spec
  • GET /transaction/material
  • GET /transaction/material/v14
  • POST /transaction
  • POST /transaction/dry-run
  • POST /transaction/fee-estimate
  • POST /transaction/metadata-blob
  • POST /transaction/parse

Method unavailable?

If you need a method we don't support yet, please contact our support.
We'd be happy to assist.

Updated 2 days ago

Did this page help you?

Updated 2 days ago

Did this page help you?