polkadot-js/api
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 · 2026-08-28
Health v2 · maintenance only
88/100
- Activity 93
- Release rhythm 76
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 7
- age_days: 3210
- days_rel: 163
- days_push: 42
- n_releases_24m: 46
Adoption not part of the score
1110 stars · 387 forks observed · 2026-08-28
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 2026-08-28 · 043219b64fb9
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| polkadot-js/api | main | 88 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem