Promise and RxJS APIs around Polkadot and Substrate based chains via RPC calls. It is dynamically generated based on what the Substrate runtime provides in terms of metadata.
Last updated Jun 30, 2026
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README
@polkadot/api
This library provides a clean wrapper around all the methods exposed by a Polkadot/Substrate network client and defines all the types exposed by a node. For complete documentation around the interfaces and their use, visit the documentation portal.
If you are an existing user, please be sure to track the CHANGELOG when changing versions.
tutorials
Looking for tutorials to get started? Look at examples for guides on how to use the API to make queries and submit transactions.
