API Documentation
for Web3

Explore our comprehensive API documentation for QuickNode developer tools and over 40 supported blockchains. Learn to call hundreds of RPC methods and utilize REST API endpoints across various blockchains and QuickNode products using JavaScript, Python, Ruby, Go, and popular Web3 SDKs.

Get Started with RPC/REST API

Connect to the blockchain

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import { Core } from '@quicknode/sdk'
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const core = new Core({
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	endpointUrl: 'https://{your-endpoint-name}.quiknode.pro/{your-token}/',
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})
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core.client.getBlockNumber()
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Core API

Use the quickest and most reliable blockchain API with unparalleled latency, reliability, and scalability across all major blockchains.

QuickAlerts

Leverage a custom real-time blockchain data feed, advanced alerting, and include real-time blockchain event driven logic into your workflows.

NFT API

Retrieving NFT metadata from the blockchain is tedious and time-consuming. Our NFT API does the heavy lifting for you across Solana and Ethereum NFTs.

Token API

Our Token API lets you easily look up ERC-20 tokens by wallet, token transfers, and token details instantly. No indexing required!

QuickNode APIs

• Start using Core API
• Start using NFT API
• Start using Token API

Quick Starts

• Look Up the Address Balance for a Wallet for Bitcoin on QuickNode
• Track Blockchain Event Data with QuickAlerts
• Get Transaction Data with QuickNode's Graph API

Marketplace

• Create an RPC Add-on
• Use QuickNode Single Flight RPC
• View All Marketplace Add-ons