Build anything onchain

Node

Build and scale your app on the most powerful web3 development platform.

Data

Access complete blockchain data through one unified API that grows with you.

Wallets

Simple APIs to send gasless transactions with advanced smart wallet features.

Rollups

Launch a custom rollup with native developer tools and scale to millions.

Query the blockchain instantly

Request

curl -X POST https://eth-mainnet.g.alchemy.com/v2/{apiKey} \     -H "Content-Type: application/json" \     -d '{  "jsonrpc": "2.0",  "method": "eth_getBlockByNumber",  "params": [    "0x68b3",    false  ],  "id": 1}'

Quickstart

Guides for 500+ endpoints on 80+ networks

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Build anything onchain

Blockchain basics

Get started by learning how to connect your app to Ethereum using Alchemy's JSON-RPC API.

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Sponsor gas

Send gasless transactions on EVM and Solana or allow users to pay with ERC-20 tokens for seamless transactions

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Real-time notifications via webhooks

Receive fast and reliable HTTP POST requests for onchain events across 80+ chains. No polling required.

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Send reliable transactions

Built-in retries, gas optimization, and status tracking so transactions land onchain every time

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Onchain events subscriptions

Learn to subscribe to pending transactions, log events, new blocks and more using WebSockets across chains.

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Upgrade to EIP-7702

Enable existing EOAs to benefit from batching actions, sponsoring transactions, and more.

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