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THE WEB3 DEVELOPER HUB

View API References, guides, and tutorials for Ethereum, Polygon, Optimism,
Arbitrum, Solana, Base, Starknet and Astar.

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NFT API docs...

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NFT API QUICKSTART

Easiest way to get NFT data from ownership to sales to metadata and more.


ETHEREUM API QUICKSTART

How to get started building on Ethereum and using the JSON-RPC API.


SDK QUICKSTART

The easiest way to connect your dApp to the blockchain using JavaScript.


ALCHEMY_PENDINGTRANSACTIONS

Subscribe to full transaction objects or hashes that are pending based on
provided filters.


WHAT ARE PAYABLE FUNCTIONS IN SOLIDITY?

Learn how payable functions work in Solidity.


HOW TO GET ALL NFTS OWNED BY AN ADDRESS

Query all NFTs owned by a provided address in one line of code.


LEARN HOW TO BUILD IN WEB3


ALCHEMY UNIVERSITY

Ethereum Developer Bootcamp and JavaScript Fundamentals Courses, for free.


CREATE WEB3 DAPP

Create a full-stack dApp in ~4 mins, right from the command-line.


VIEW ALL TUTORIALS

Web3 tutorials for all topics: NFTs, Solidity, DeFI, transactions, and more!


API REFERENCES FOR ALL CHAINS

Including free Archive data on all chains and testnets.


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POLYGON POS


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USE CASE APIS

APIs built to optimize your code and make life as a developer way easier.

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NFT API

Get all the NFT data you need with this suite of endpoints


TRANSACT

Send transactions 7.9x faster


TOKEN API

Get token valuable information to display to users


TRANSFERS API

Get historical transactions for any address or contract


NOTIFY API

Webhooks for transaction activity


AA INFRA

ERC-4337 Bundler and Paymaster APIs


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