# @polkadot/extension-chains

> Definitions for all known chains as exposed by the extension.

Latest version **0.63.1** (published 2026-03-31) · Apache-2.0 license · 0 weekly downloads

## Install

```sh
npm install @polkadot/extension-chains
pnpm add @polkadot/extension-chains
yarn add @polkadot/extension-chains
bun add @polkadot/extension-chains
```

## Health

**Score 50/100 (C)** — status: active.

Positive: no vulnerabilities; high maintenance score.

Warnings: low downloads; no types; no esm support; pre 1.0.

## Facts

| | |
|---|---|
| Version | 0.63.1 |
| Published | 2026-03-31 |
| First published | 2019-09-06 |
| Weekly downloads | 0 |
| License | Apache-2.0 |
| TypeScript types | none |
| Module format | CommonJS |
| Dependencies | 0 |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 1023 |
| Author | Jaco Greeff |
| Maintainers | jacogr, polkadotjs, paritytech-ci |

## Links

- npm: https://www.npmjs.com/package/@polkadot/extension-chains
- Repository: https://github.com/polkadot-js/extension
- Homepage: https://github.com/polkadot-js/extension/tree/master/packages/extension-chains#readme
- Issues: https://github.com/polkadot-js/extension/issues
- npm.io page: https://npm.io/package/@polkadot/extension-chains

## Recent versions

- 0.63.1 (latest) — 2026-03-31
- 0.44.2-4 (beta) — 2022-06-21
- 0.62.6 — 2025-11-26
- 0.62.5 — 2025-11-17
- 0.62.4 — 2025-11-13
- 0.62.3 — 2025-10-23
- 0.62.2 — 2025-10-09
- 0.62.1 — 2025-09-25
- 0.61.7 — 2025-08-28
- 0.61.6 — 2025-08-14
- 0.61.5 — 2025-07-30
- 0.61.4 — 2025-07-17
- 0.61.3 — 2025-07-08
- 0.61.2 — 2025-07-04
- 0.61.1 — 2025-06-27
- … 540 more at https://npm.io/package/@polkadot/extension-chains/versions

## README

# @polkadot/extension-chains

Definitions for chains that are supported by this extension. It contains the bare definitions as well as a stripped-down (call-only) metadata format.

---
_Source: https://npm.io/package/@polkadot/extension-chains · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._