polkadot-js/api
Some data may be outdated — see provenance labels.
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. observed · 2026-09-25
Health v2 · maintenance only
97/100
- Activity 96
- Release rhythm 96
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-10-21. Adoption (stars, forks) is never an input.
- gap_med: 7.0
- age_days: 3258
- days_rel: 27
- days_push: 27
- n_releases_24m: 43
Adoption not part of the score
1111 stars · 391 forks observed · 2026-09-25
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
A TypeScript library providing Promise and RxJS APIs for interacting with Polkadot and Substrate-based blockchain nodes via RPC calls. It dynamically generates its interfaces from the runtime metadata exposed by the connected node.
Use cases
- query balances and chain state from a Polkadot node
- submit transactions to a Substrate-based chain
- build a dApp frontend that talks to Polkadot
- listen to on-chain events in real time
- interact with any Substrate runtime via dynamically generated types
When to avoid
- you need a non-JavaScript language client
- you are working with chains that are not Polkadot/Substrate-based
- you only need lightweight raw JSON-RPC calls without type generation
Facets
library · maturity active
rpc http-client sdk serialization blockchain developer-tools apis browser cross-platform polkadot substrate web3 rxjs jsonrpc blockchain-api cryptocurrency nodejs typescript
1 source
- readme: https://github.com/polkadot-js/api · fetched 2026-09-25 · 043219b64fb9
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| polkadot-js/api | main | 97 |
For agents
Data as of 2026-10-19T08:05:51.212177+00:00 · Report a problem