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Home Tutorials Recipes API Reference

👋 Introduction

Alchemy API Reference Overview
- Chain APIs Overview
- Enhanced APIs Overview
Alchemy Quickstart Guide

📚 Resources

FAQ
Compute Units
- Pricing Plans
- Compute Unit Costs

📜 Alchemy Rollups

Rollups Quickstart
Supported Stacks

👤 Embedded Accounts

Quickstart
Try demo
Account Kit Docs
Accounts API Endpoints
Accounts API Endpoints

🪄 BUNDLER API

Supported Chains
Bundler API Quickstart
Bundler API Endpoints
Bundler API Fee Logic
Bundler RPC Errors
UserOperation Simulation Endpoints
- alchemy_simulateUserOperationAssetChangespost
EntryPoint Revert Codes
Factory Addresses
FAQs

🪄 Gas Manager Admin API

Supported Chains
Gas Manager Coverage API Quickstart
Gas Manager Coverage API Endpoints
Gas Manager Admin API Quickstart
Gas Manager Admin API Endpoints
Gas Manager Coverage API Fee Logic & Usage Limits
Gas Manager Errors
Gas Manager Deployment Addresses

🎨 NFT API

NFT API Quickstart
NFT API Endpoints Overview
NFT API FAQ
NFT Ownership Endpoints
NFT Metadata Endpoints
NFT Spam Endpoints
NFT Sales Endpoints
- Floor Prices By Slugget
- NFT Salesget

💸 Transfers API (Tx History)

Transfers API Quickstart
Transfers API Endpoints
- alchemy_getAssetTransferspost

🧾 Transaction Receipts API

Transaction Receipts Endpoints
- alchemy_getTransactionReceiptspost

🪙 Token API

Token API Quickstart
Token API Endpoints

📈 Prices API

Prices API Quickstart
Prices API Endpoints

🍊 Subgraphs

Subgraphs Quickstart
Supported Subgraph Chains
Developing a Subgraph
Moving your Subgraph to Production
Community subgraphs

🔔 Webhooks

Webhooks API Quickstart
- Webhooks Tutorials and Applications
- Webhooks API FAQ
Custom Webhooks Quickstart
Custom Webhook API Methods
Notify API Methods
Webhook Types

🔊 Websockets

Subscription API Quickstart
Best Practices for Using WebSockets in Web3
Subscription API Endpoints

🔎 Trace API

Trace API Quickstart
Trace API Endpoints
Trace API Resources

🪲 Debug API

Debug API Quickstart
Debug API Endpoints

💰 Alchemy Transact

Transact Quickstart
Reinforced Transactions
Transaction Simulation
Transaction Simulation Endpoints
Gas Optimized Transactions
- alchemy_getGasOptimizedTransactionStatuspost
- alchemy_sendGasOptimizedTransactionpost
Private Transactions
- eth_cancelPrivateTransactionpost
- eth_sendPrivateTransactionpost

🛠️ Alchemy SDK

Alchemy SDK Quickstart
Alchemy SDK Surface Overview
- Alchemy SDK vs. Raw API Methods
SDK Core Methods
SDK NFT Methods
SDK Transact Methods
SDK Debug Methods
SDK Notify Methods
SDK WebSockets Endpoints
SDK Ethers Utils
Alchemy SDK V2 to V3 Migration Guide
- Alchemy SDK V2 vs. V3 Method Differences
SDK V2 Methods

💎 Ethereum

Ethereum API Quickstart
Ethereum API FAQ
Ethereum API Endpoints

💜 Polygon PoS

Polygon PoS API Quickstart
- Polygon SDK Examples
Polygon PoS API FAQ
Polygon PoS API Endpoints

💟 Polygon zkEVM

Polygon zkEVM API Quickstart
Polygon zkEVM API FAQ
- What is the difference between Polygon zkEVM and Ethereum?
- What is the difference between Polygon zkEVM and Polygon PoS?
Polygon zkEVM Endpoints

🪐 Arbitrum

Arbitrum API Quickstart
- Arbitrum SDK Examples
Arbitrum API FAQ
- Arbitrum vs. Ethereum API Differences
Arbitrum API Endpoints

🔴 Optimism

Optimism API Quickstart
- Optimism SDK Examples
Optimism API FAQ
- Optimism Error Codes
Optimism API Endpoints

🔵 Base

Base API Quickstart
Base API FAQ
Base API Endpoints

❇️ Solana

Solana API Quickstart
Solana API FAQ
Solana API Endpoints

⭐️ Astar

Astar API Quickstart
Astar API FAQ
Astar API Endpoints

🛸 STARKNET

Starknet API Quickstart
Starknet API FAQ
Starknet API Endpoints

🎯 zksync

zkSync Era API Quickstart
zkSync Era API FAQ
zkSync Era API Endpoints

🟨 BNB SMART CHAIN (PAID TIERS)

BNB Smart Chain Quickstart
BNB Smart Chain FAQ
BNB Smart Chain Endpoints

🟢 GNOSIS (Paid Tier)

Gnosis Chain API Quickstart
Gnosis Chain API FAQ
Gnosis Chain API Endpoints

🔴 Avalanche C-Chain (PAID TIERS)

Avalanche C-Chain API Quickstart
Avalanche C-Chain API FAQ
Avalanche C-Chain API Endpoints

🟠 Arbitrum Nova

Arbitrum Nova Chain API Quickstart
Arbitrum Nova Chain API FAQ
Arbitrum Nova Chain API Endpoints

🟢 ZetaChain

ZetaChain API Quickstart
ZetaChain API FAQ
Zetachain API Endpoints

🟡 Blast

Blast Chain API Quickstart
Blast Chain API FAQ
Blast Chain API Endpoints

📃 Scroll

Scroll Chain API Quickstart
Scroll Chain API FAQ
Scroll Chain API Endpoints

⚫️ Linea

Linea Chain API Quickstart
Linea Chain API FAQ
Linea Chain API Endpoints

⬛️ Mantle

Mantle Chain API Quickstart
Mantle Chain API FAQ
Mantle Chain API Endpoints

🐻 Berachain

Berachain API Quickstart
Berachain API FAQ
Berachain API Endpoints

🔹 METIS (Paid Tiers)

Metis Chain API Quickstart
Metis Chain API FAQ
Metis Chain API Endpoints

🔲 Sonic

Sonic Chain API Quickstart
Sonic Chain API FAQ
Sonic Chain API Endpoints

❇️ Flow

Flow API Quickstart
Flow API FAQ
Flow API Endpoints

🔵 CrossFi

CrossFi API Quickstart
CrossFi API FAQ
CrossFi API Endpoints

🔲 Soneium

Soneium API Quickstart
Soneium API FAQ
Soneium API Endpoints

🌸 Unichain

Unichain API Quickstart
Unichain API FAQ
Unichain API Endpoints

◼️ World Chain

World Chain API Quickstart
World Chain API FAQ
World Chain API Endpoints

🔲 Rootstock

Rootstock API Quickstart
Rootstock API FAQ
Rootstock API Endpoints

⚫️ Shape

Shape API Quickstart
Shape API FAQ
Shape API Endpoints

🟦 Apechain

ApeChain API Quickstart
ApeChain API FAQ
ApeChain API Endpoints

🌺 Geist

Geist API Quickstart
Geist API FAQ
Geist API Endpoints

♠️ Lens

Lens API Quickstart
Lens API FAQ
Lens API Endpoints

✳️ Abstract

Abstract API Quickstart
Abstract API FAQ
Abstract API Endpoints

📒 opBNB (Paid Tier)

opBNB Chain API Quickstart
opBNB Chain API FAQ
opBNB Chain API Endpoints

☮️ Ink

Ink API Quickstart
Ink API FAQ
Ink API Endpoints

🔲 Lumia

Lumia API Quickstart
Lumia API FAQ
Lumia API Endpoints

👋 Introduction

Alchemy API Reference Overview
- Chain APIs Overview
- Enhanced APIs Overview
Alchemy Quickstart Guide

📚 Resources

FAQ
Compute Units
- Pricing Plans
- Compute Unit Costs

📜 Alchemy Rollups

Rollups Quickstart
Supported Stacks

👤 Embedded Accounts

Quickstart
Try demo
Account Kit Docs
Accounts API Endpoints
Accounts API Endpoints

🪄 BUNDLER API

Supported Chains
Bundler API Quickstart
Bundler API Endpoints
Bundler API Fee Logic
Bundler RPC Errors
UserOperation Simulation Endpoints
- alchemy_simulateUserOperationAssetChangespost
EntryPoint Revert Codes
Factory Addresses
FAQs

🪄 Gas Manager Admin API

Supported Chains
Gas Manager Coverage API Quickstart
Gas Manager Coverage API Endpoints
Gas Manager Admin API Quickstart
Gas Manager Admin API Endpoints
Gas Manager Coverage API Fee Logic & Usage Limits
Gas Manager Errors
Gas Manager Deployment Addresses

🎨 NFT API

NFT API Quickstart
NFT API Endpoints Overview
NFT API FAQ
NFT Ownership Endpoints
NFT Metadata Endpoints
NFT Spam Endpoints
NFT Sales Endpoints
- Floor Prices By Slugget
- NFT Salesget

💸 Transfers API (Tx History)

Transfers API Quickstart
Transfers API Endpoints
- alchemy_getAssetTransferspost

🧾 Transaction Receipts API

Transaction Receipts Endpoints
- alchemy_getTransactionReceiptspost

🪙 Token API

Token API Quickstart
Token API Endpoints

📈 Prices API

Prices API Quickstart
Prices API Endpoints

🍊 Subgraphs

Subgraphs Quickstart
Supported Subgraph Chains
Developing a Subgraph
Moving your Subgraph to Production
Community subgraphs

🔔 Webhooks

Webhooks API Quickstart
- Webhooks Tutorials and Applications
- Webhooks API FAQ
Custom Webhooks Quickstart
Custom Webhook API Methods
Notify API Methods
Webhook Types

🔊 Websockets

Subscription API Quickstart
Best Practices for Using WebSockets in Web3
Subscription API Endpoints

🔎 Trace API

Trace API Quickstart
Trace API Endpoints
Trace API Resources

🪲 Debug API

Debug API Quickstart
Debug API Endpoints

💰 Alchemy Transact

Transact Quickstart
Reinforced Transactions
Transaction Simulation
Transaction Simulation Endpoints
Gas Optimized Transactions
- alchemy_getGasOptimizedTransactionStatuspost
- alchemy_sendGasOptimizedTransactionpost
Private Transactions
- eth_cancelPrivateTransactionpost
- eth_sendPrivateTransactionpost

🛠️ Alchemy SDK

Alchemy SDK Quickstart
Alchemy SDK Surface Overview
- Alchemy SDK vs. Raw API Methods
SDK Core Methods
SDK NFT Methods
SDK Transact Methods
SDK Debug Methods
SDK Notify Methods
SDK WebSockets Endpoints
SDK Ethers Utils
Alchemy SDK V2 to V3 Migration Guide
- Alchemy SDK V2 vs. V3 Method Differences
SDK V2 Methods

💎 Ethereum

Ethereum API Quickstart
Ethereum API FAQ
Ethereum API Endpoints

💜 Polygon PoS

Polygon PoS API Quickstart
- Polygon SDK Examples
Polygon PoS API FAQ
Polygon PoS API Endpoints

💟 Polygon zkEVM

Polygon zkEVM API Quickstart
Polygon zkEVM API FAQ
- What is the difference between Polygon zkEVM and Ethereum?
- What is the difference between Polygon zkEVM and Polygon PoS?
Polygon zkEVM Endpoints

🪐 Arbitrum

Arbitrum API Quickstart
- Arbitrum SDK Examples
Arbitrum API FAQ
- Arbitrum vs. Ethereum API Differences
Arbitrum API Endpoints

🔴 Optimism

Optimism API Quickstart
- Optimism SDK Examples
Optimism API FAQ
- Optimism Error Codes
Optimism API Endpoints

🔵 Base

Base API Quickstart
Base API FAQ
Base API Endpoints

❇️ Solana

Solana API Quickstart
Solana API FAQ
Solana API Endpoints

⭐️ Astar

Astar API Quickstart
Astar API FAQ
Astar API Endpoints

🛸 STARKNET

Starknet API Quickstart
Starknet API FAQ
Starknet API Endpoints

🎯 zksync

zkSync Era API Quickstart
zkSync Era API FAQ
zkSync Era API Endpoints

🟨 BNB SMART CHAIN (PAID TIERS)

BNB Smart Chain Quickstart
BNB Smart Chain FAQ
BNB Smart Chain Endpoints

🟢 GNOSIS (Paid Tier)

Gnosis Chain API Quickstart
Gnosis Chain API FAQ
Gnosis Chain API Endpoints

🔴 Avalanche C-Chain (PAID TIERS)

Avalanche C-Chain API Quickstart
Avalanche C-Chain API FAQ
Avalanche C-Chain API Endpoints

🟠 Arbitrum Nova

Arbitrum Nova Chain API Quickstart
Arbitrum Nova Chain API FAQ
Arbitrum Nova Chain API Endpoints

🟢 ZetaChain

ZetaChain API Quickstart
ZetaChain API FAQ
Zetachain API Endpoints

🟡 Blast

Blast Chain API Quickstart
Blast Chain API FAQ
Blast Chain API Endpoints

📃 Scroll

Scroll Chain API Quickstart
Scroll Chain API FAQ
Scroll Chain API Endpoints

⚫️ Linea

Linea Chain API Quickstart
Linea Chain API FAQ
Linea Chain API Endpoints

⬛️ Mantle

Mantle Chain API Quickstart
Mantle Chain API FAQ
Mantle Chain API Endpoints

🐻 Berachain

Berachain API Quickstart
Berachain API FAQ
Berachain API Endpoints

🔹 METIS (Paid Tiers)

Metis Chain API Quickstart
Metis Chain API FAQ
Metis Chain API Endpoints

🔲 Sonic

Sonic Chain API Quickstart
Sonic Chain API FAQ
Sonic Chain API Endpoints

❇️ Flow

Flow API Quickstart
Flow API FAQ
Flow API Endpoints

🔵 CrossFi

CrossFi API Quickstart
CrossFi API FAQ
CrossFi API Endpoints

🔲 Soneium

Soneium API Quickstart
Soneium API FAQ
Soneium API Endpoints

🌸 Unichain

Unichain API Quickstart
Unichain API FAQ
Unichain API Endpoints

◼️ World Chain

World Chain API Quickstart
World Chain API FAQ
World Chain API Endpoints

🔲 Rootstock

Rootstock API Quickstart
Rootstock API FAQ
Rootstock API Endpoints

⚫️ Shape

Shape API Quickstart
Shape API FAQ
Shape API Endpoints

🟦 Apechain

ApeChain API Quickstart
ApeChain API FAQ
ApeChain API Endpoints

🌺 Geist

Geist API Quickstart
Geist API FAQ
Geist API Endpoints

♠️ Lens

Lens API Quickstart
Lens API FAQ
Lens API Endpoints

✳️ Abstract

Abstract API Quickstart
Abstract API FAQ
Abstract API Endpoints

📒 opBNB (Paid Tier)

opBNB Chain API Quickstart
opBNB Chain API FAQ
opBNB Chain API Endpoints

☮️ Ink

Ink API Quickstart
Ink API FAQ
Ink API Endpoints

🔲 Lumia

Lumia API Quickstart
Lumia API FAQ
Lumia API Endpoints

eth_blockNumber - BNB

post https://bnb-mainnet.g.alchemy.com/v2/{apiKey}

Returns the number of the most recent block.

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