Polkadot

Substrate API Sidecar

The Substrate API Sidecar is an open-source REST service maintained by Parity Technologies that provides a RESTful interface for interacting with Polkadot SDK-based blockchains. It covers blocks, accounts (balances, assets, foreign assets), transactions (dry-run, parse, material), staking, and parachain/coretime data. Parity provides public hosted instances for Polkadot, Kusama, Polkadot Asset Hub, and Kusama Asset Hub. Self-hosting is recommended for production use.

GitHub OpenAPI

Documentation

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Documentation
https://docs.polkadot.com/chain-interactions/query-data/query-rest/

Specifications

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OpenAPI
https://raw.githubusercontent.com/api-evangelist/polkadot/refs/heads/main/openapi/substrate-api-sidecar-openapi.yaml

SDKs

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GitHubRepository
https://github.com/paritytech/substrate-api-sidecar

OpenAPI Specification

substrate-api-sidecar-openapi.yaml Raw ↑