# Kusama JSON-RPC API

**Canonical:** https://apis.io/apis/kusama/json-rpc/  
**Provider:** Kusama — https://apis.io/providers/kusama/  
**Base URL:** https://kusama-rpc.polkadot.io/  
**Documentation:** https://paritytech.github.io/json-rpc-interface-spec/

Kusama JSON-RPC API is one of 21 APIs that [Kusama](https://apis.io/providers/kusama/) publishes on the [APIs.io](https://apis.io/) network, described by an AsyncAPI event-driven specification. Tagged areas include JSON-RPC, Blockchain, and Substrate. The published artifact set on APIs.io includes an AsyncAPI specification.

The public Substrate JSON-RPC 2.0 interface to the Kusama relay chain. Probed live on 2026-07-19: 130 methods are advertised by rpc_methods, spanning chain (blocks/headers), state (storage, metadata, runtime version), author (extrinsic submission), system (health, properties, peers), payment (fee queries), and the newer spec-versioned chainHead_v1 / archive_v1 / transaction_v1 / transactionWatch_v1 families defined by the Polkadot JSON-RPC interface specification. Available over HTTPS (request/response) and WSS (subscriptions). No authentication.

## Machine-readable artifacts (3)

- **Examples** — https://raw.githubusercontent.com/api-evangelist/kusama/refs/heads/main/examples/kusama-jsonrpc-examples.json
- **AsyncAPI** — https://raw.githubusercontent.com/api-evangelist/kusama/refs/heads/main/asyncapi/kusama-jsonrpc-asyncapi.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/kusama/refs/heads/main/apis.yml

## Other Kusama APIs (12)

- [Kusama accounts API](https://apis.io/apis/kusama/kusama-accounts-api/)
- [Kusama ahm API](https://apis.io/apis/kusama/kusama-ahm-api/)
- [Kusama blocks API](https://apis.io/apis/kusama/kusama-blocks-api/)
- [Kusama contracts API](https://apis.io/apis/kusama/kusama-contracts-api/)
- [Kusama coretime API](https://apis.io/apis/kusama/kusama-coretime-api/)
- [Kusama node API](https://apis.io/apis/kusama/kusama-node-api/)
- [Kusama pallets API](https://apis.io/apis/kusama/kusama-pallets-api/)
- [Kusama paras API](https://apis.io/apis/kusama/kusama-paras-api/)
- [Kusama rc accounts API](https://apis.io/apis/kusama/kusama-rc-accounts-api/)
- [Kusama rc API](https://apis.io/apis/kusama/kusama-rc-api/)
- [Kusama rc blocks API](https://apis.io/apis/kusama/kusama-rc-blocks-api/)
- [Kusama rc node API](https://apis.io/apis/kusama/kusama-rc-node-api/)

## Tags

JSON-RPC, Blockchain, Substrate

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/kusama/json-rpc/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/kusama/.