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The Web3 Developer Hub

View API References, guides, and tutorials for Ethereum, Polygon, Optimism, Arbitrum, Solana, Flow and Crypto.org.

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Tutorials, bootcamps, courses.

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Recipes, scripts, pre-built projects.

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API references and code examples.

API References for all Chains

Including free Archive data on all chains and testnets.

Use Case APIs

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

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.

Trace API

Deep insights for transaction processing.

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Web3’s Most Powerful SDK

The Alchemy SDK is the easiest way to connect your dApp to the blockchain. Just download, write two lines of code, and you’re ready to go.

Learn how to build in Web3

Check out these beginner to expert level tutorials for building in Web3.

Road to Web3

Join a community of 10,000+ developers to learn how to build in Web3.

Hello world smart contract

Beginner friendly tutorial for building the most simple smart contract.Ωz

How to create an NFT

Learn how to build and deploy an ERC-721 token.

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