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Version: 22.1.x

Polymesh SDK Readme

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Polymesh version

This release is compatible with Polymesh v6.x.x

Getting Started


The Polymesh SDK's main goal is to provide external developers with a set of tools that will allow them to build powerful applications that interact with the Polymesh protocol. It focuses on abstracting away all the complexities of the Polymesh blockchain and expose a simple but complete interface. The result is a feature-rich, user-friendly node.js library.

Technical Pre-requisites

In order to use the Polymesh SDK, you must install node (version 16) and npm. The library is written in typescript, but can also be used in plain javascript. This document will assume you are using typescript, but the translation to javascript is very simple.


Token Studio SDK Walkthrough:

Polymesh SDK API Reference:

How to use


npm i @polymeshassociation/polymesh-sdk --save

Or, if you're using yarn

yarn add @polymeshassociation/polymesh-sdk

Or, if using pnpm

pnpm add @polymeshassociation/polymesh-sdk

NOTE it is highly recommended that you use one of these three package managers. This project uses package resolutions/overrides to pin certain problematic dependencies, and these are only supported by the aforementioned package managers. Using a different package manager may result in unexpected behavior

NOTE if using TypeScript the compiler option "skipLibCheck" should be set to true in your tsconfig.json file

Initializing the client

Before you can start registering Tickers and creating Assets, you have to connect the Polymesh SDK client to a Polymesh node. This is a pretty straightforward process:

import { Polymesh } from '@polymeshassociation/polymesh-sdk';
import { LocalSigningManager } from '@polymeshassociation/local-signing-manager';

async function run() {
const signingManager = await LocalSigningManager.create({
accounts: [
seed: 'YOU_WISH',
const polyClient = await Polymesh.connect({
nodeUrl: 'wss://',

// do stuff with the client

Here is an overview of the parameters passed to the connect function:

  • nodeUrl is a URL that points to a running Polymesh node
  • signingManager is an object that complies with the SigningManager interface. It holds the Accounts capable of signing transactions, and the signing logic itself. In this example, LocalSigningManager is a simple signing manager that holds private keys in memory and signs with them

NOTE: if using the SDK on a browser environment (i.e. with the Polymesh wallet browser extension), you would use the BrowserExtensionSigningManager provided by @polymeshassociation/browser-extension-signing-manager

import { Polymesh } from '@polymeshassociation/polymesh-sdk';
import { BrowserExtensionSigningManager } from '@polymeshassociation/browser-extension-signing-manager';

async function run() {
const signingManager = await BrowserExtensionSigningManager.create(
); // The Polymesh wallet extension will ask the user to authorize MY_APP_NAME for access

const polyClient = await Polymesh.connect({
nodeUrl: 'wss://',

// do stuff with the client