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Polkadot RPC

With QuickNode, you get access to our global network which always routes your API requests to the nearest available location, ensuring low latency and fastest speeds.
Beta

Note:

The QuickNode Polkadot documentation constantly evolves as the chain undergoes upgrades and changes. We highly recommend cross-referencing with the Polkadot Documentation for the latest updates.

Overview

At QuickNode, we run Polkadot RPC endpoints in Beta. In aggregate, we serve hundreds of billions of requests every month. To make it easier for developers to integrate with QuickNode, we've created this documentation that shows how to call RPC methods using cURL, JavaScript, Python, Ruby and any applicable Web3 SDKs. QuickNode-supported Polkadot APIs include:

  • Polkadot JSON-RPC API

Polkadot Network Support

NetworkWSSHTTPS
MAINNET

Making Polkadot API Requests

In this documentation, you will see example requests made with various programming languages and Web3 SDKs for each supported Polkadot method. This section will explain how to execute each one of them on your machine.

cURL

Most *nix based systems have cURL support out of the box. cURL is a command line tool and library for transferring data with URLs. Check if you have it by running the following:

curl -h

Python

To run our Python code examples, you'll need to have Python installed as well as the requests package. You can install this package with the following command:

python -m pip install requests

JavaScript

To run our JavaScript code examples, you'll need to have Node v18 and up installed. You can follow this official document to install the latest, stable version of Node globally. Check if you have it by running the following:

node -v

Ruby

To run our Ruby code examples, you'll need to have Ruby installed. You can follow this official installation document for more information. Check if you have it by running the following:

ruby -v

WebSocket cat (wscat)

WebSocket cat (wscat) is a simple tool for connecting to WebSocket APIs in your terminal. Install it using the following command:

npm install -g wscat
info

If you're seeking an alternative to WebSocket cat (wscat), QuickNode's QuickAlerts provide a solution for setting up real-time notifications for any type of blockchain activity. To learn more about QuickAlerts, check out this QuickNode guide.

API Credits

Usage in our pricing plans is measured in API Credits. To learn more about the API Credits for Polkadot, please visit this page.

WebSocket Limits

WebSocket responses are capped at a certain limit, which is subject to change. In cases where responses are potentially large, it is recommended to use a POST request. If the response size exceeds the limit, the associated error code will be -32616.

Endpoint Authentication Options

Token Authentication

By default, all endpoints created on QuickNode are protected by a token in the URL which looks something like this:

http://sample-endpoint-name.network.quiknode.pro/token-goes-here/

Approved Referrer List

For endpoints on the shared network, you are able to add a list of approved referrers. This requires any HTTP request to send a REFERRER header or any WebSocket request to send an ORIGIN header populated with one of the referrers you entered into our user panel.

Disabling Token Authentication

You can also disable the token authentication completely in your security settings for a given endpoint. This will allow anyone to make requests to the endpoint without the token.

JWT (JSON Web Tokens)

For additional security, you can also enable JWT for each of your deployed endpoints. JWT allows for stateless authentication between you and your endpoint. Learn how to use JWT with QuickNode in this step-by-step guide.

Multiple Authentication Tokens

Create multiple authentication tokens for each of your deployed endpoints. This allows you to revoke any tokens that may be comprised, without needing to restart your non-compromised endpoint.

To roll an individual authentication token, create an additional token and then delete the previous token. Learn more about multiple authentication tokens in this QuickNode guide.

Secure Your QuickNode Polkadot Endpoint

Enhance the security of your QuickNode RPC endpoints using the Endpoint Armor add-on. This add-on provides a secure URL for safer public and front-end usage, allowing you to control access, set rate limits, and restrict methods for heightened security and streamlined management. You can find more information about Endpoint Armor on this page.

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