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PrismarineJS logomineflayer

Create Minecraft bots with a powerful, stable, and high level JavaScript API.

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Quick Overview

Mineflayer is a powerful, flexible, and feature-rich JavaScript library for creating Minecraft bots. It provides a high-level API for interacting with Minecraft servers, allowing developers to create automated players, chat bots, and other custom functionality within the game.

Pros

  • Extensive API covering most Minecraft interactions
  • Active community and regular updates
  • Cross-platform compatibility (works with Node.js)
  • Supports multiple Minecraft versions

Cons

  • Steep learning curve for beginners
  • Performance can be an issue with complex bots
  • Limited documentation for advanced features
  • Potential for abuse if used improperly on public servers

Code Examples

  1. Connecting to a server and logging chat messages:
const mineflayer = require('mineflayer')

const bot = mineflayer.createBot({
  host: 'localhost',
  username: 'bot'
})

bot.on('chat', (username, message) => {
  if (username === bot.username) return
  console.log(`${username}: ${message}`)
})
  1. Making the bot move and jump:
bot.on('spawn', () => {
  bot.setControlState('forward', true)
  bot.setControlState('jump', true)
  setTimeout(() => {
    bot.setControlState('forward', false)
    bot.setControlState('jump', false)
  }, 5000)
})
  1. Crafting an item:
const mcData = require('minecraft-data')(bot.version)
const Item = require('prismarine-item')(bot.version)

bot.craft(new Item(mcData.itemsByName.stick.id, 4), 1, null, (err) => {
  if (err) {
    console.log(err)
  } else {
    console.log('Crafted 4 sticks')
  }
})

Getting Started

To get started with Mineflayer, follow these steps:

  1. Install Node.js and npm
  2. Create a new directory for your project
  3. Initialize a new npm project: 
    npm init -y
  4. Install Mineflayer: 
    npm install mineflayer
  5. Create a new file (e.g., bot.js) and add the following code: 
    const mineflayer = require('mineflayer')

const bot = mineflayer.createBot({
  host: 'localhost', // Change this to your server's address
  username: 'MyBot',
  port: 25565 // Change if your server uses a different port
})

bot.on('spawn', () => {
  console.log('Bot has spawned!')
})

bot.on('chat', (username, message) => {
  if (username === bot.username) return
  bot.chat(`Hello, ${username}! You said: ${message}`)
})
  6. Run your bot: 
    node bot.js

This basic setup will create a bot that connects to a local Minecraft server and responds to chat messages.

Competitor Comparisons

PrismarineJS logo

node-minecraft-protocol

1,218

Parse and serialize minecraft packets, plus authentication and encryption.

Pros of node-minecraft-protocol

  • Lower-level protocol implementation, offering more flexibility and control
  • Lighter weight and potentially faster for specific use cases
  • Suitable for building custom clients or servers from scratch

Cons of node-minecraft-protocol

  • Requires more manual implementation of game mechanics and features
  • Steeper learning curve for beginners
  • Less out-of-the-box functionality for common bot tasks

Code Comparison

mineflayer:

const mineflayer = require('mineflayer')
const bot = mineflayer.createBot({ username: 'Player' })

bot.on('chat', (username, message) => {
  if (message === 'hello') bot.chat('Hi!')
})

node-minecraft-protocol:

const mc = require('minecraft-protocol')
const client = mc.createClient({ username: 'Player' })

client.on('chat', (packet) => {
  if (packet.message === 'hello') client.write('chat', { message: 'Hi!' })
})

Both libraries are part of the PrismarineJS ecosystem, but serve different purposes. mineflayer provides a high-level API for creating Minecraft bots with built-in functionality, while node-minecraft-protocol offers a low-level implementation of the Minecraft protocol. Choose mineflayer for quick bot development and node-minecraft-protocol for more granular control over network communication.

Mojang logo

brigadier

3,411

Brigadier is a command parser & dispatcher, designed and developed for Minecraft: Java Edition.

Pros of brigadier

  • Official Minecraft command parsing library, ensuring compatibility with Mojang standards
  • Lightweight and focused solely on command parsing and dispatching
  • Highly extensible and customizable for various command structures

Cons of brigadier

  • Limited to command parsing functionality, not a full Minecraft bot framework
  • Requires more setup and integration for complex Minecraft interactions
  • Less community-driven development compared to mineflayer

Code Comparison

mineflayer example:

const mineflayer = require('mineflayer')
const bot = mineflayer.createBot({ username: 'Player' })
bot.on('chat', (username, message) => {
  if (message === 'hello') bot.chat('Hi!')
})

brigadier example:

LiteralArgumentBuilder<CommandSource> command = LiteralArgumentBuilder
    .<CommandSource>literal("hello")
    .executes(context -> {
        context.getSource().sendMessage("Hi!");
        return 1;
    });

mineflayer offers a higher-level API for bot creation and interaction, while brigadier focuses on command parsing and execution. mineflayer is more suitable for creating complex Minecraft bots, whereas brigadier is ideal for implementing custom command systems within Minecraft-related projects.

cuberite logo

cuberite

4,985

A lightweight, fast and extensible game server for Minecraft

Pros of Cuberite

  • Written in C++, potentially offering better performance for server hosting
  • Designed as a full server implementation, providing more control over game mechanics
  • Supports plugins written in Lua, offering flexibility for server customization

Cons of Cuberite

  • Smaller community and ecosystem compared to Mineflayer
  • Less frequent updates and potentially slower adoption of new Minecraft features
  • Steeper learning curve for developers not familiar with C++ or Lua

Code Comparison

Mineflayer (JavaScript):

const mineflayer = require('mineflayer')
const bot = mineflayer.createBot({ username: 'Player' })
bot.on('chat', (username, message) => {
  if (message === 'hello') bot.chat('Hi!')
})

Cuberite (Lua plugin):

function OnPlayerJoined(Player)
  Player:SendMessage("Welcome to the server!")
end

function Initialize(Plugin)
  Plugin:SetName("WelcomePlugin")
  Plugin:BindHook(cPluginManager.HOOK_PLAYER_JOINED, OnPlayerJoined)
  return true
end

Mineflayer is focused on creating bot clients, while Cuberite is a full server implementation. Mineflayer offers easier bot creation in JavaScript, whereas Cuberite provides more comprehensive server control using C++ and Lua plugins.

SpigotMC logo

BungeeCord

1,560

BungeeCord, the 6th in a generation of server portal suites. Efficiently proxies and maintains connections and transport between multiple Minecraft servers.

Pros of BungeeCord

  • Designed specifically for Minecraft server networking and proxy functionality
  • Supports multiple Minecraft server versions and implementations
  • Highly scalable for large Minecraft server networks

Cons of BungeeCord

  • Limited to server-side operations and cannot interact with the client directly
  • Requires more setup and configuration compared to Mineflayer
  • Less flexible for general-purpose Minecraft bot development

Code Comparison

Mineflayer (JavaScript):

const mineflayer = require('mineflayer')
const bot = mineflayer.createBot({ username: 'Bot' })
bot.on('chat', (username, message) => {
  if (message === 'hello') bot.chat('Hi!')
})

BungeeCord (Java):

public class MyPlugin extends Plugin {
    @EventHandler
    public void onChat(ChatEvent event) {
        if (event.getMessage().equals("hello")) {
            event.getSender().sendMessage("Hi!");
        }
    }
}

Mineflayer is more suitable for creating Minecraft bots and automation scripts, while BungeeCord is better for managing server networks and implementing proxy functionality. Mineflayer offers easier bot creation with a simpler API, whereas BungeeCord provides more robust server management capabilities but requires more setup and Java knowledge.

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README

Mineflayer

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EN EnglishRU русскийES EspañolFR FrançaisTR TürkçeZH 中文BR Português

Create Minecraft bots with a powerful, stable, and high level JavaScript API, also usable from Python.

First time using Node.js? You may want to start with the tutorial. Know Python? Checkout some Python examples and try out Mineflayer on Google Colab.

Features

  • Supports Minecraft 1.8 to 1.20.4 (1.8, 1.9, 1.10, 1.11, 1.12, 1.13, 1.14, 1.15, 1.16, 1.17, 1.18, 1.19 and 1.20)
  • Entity knowledge and tracking.
  • Block knowledge. You can query the world around you. Milliseconds to find any block.
  • Physics and movement - handle all bounding boxes
  • Attacking entities and using vehicles.
  • Inventory management.
  • Crafting, chests, dispensers, enchantment tables.
  • Digging and building.
  • Miscellaneous stuff such as knowing your health and whether it is raining.
  • Activating blocks and using items.
  • Chat.

Roadmap

Checkout this page to see what our current projects are.

Installation

First install Node.js >= 18 from nodejs.org then:

npm install mineflayer

To update mineflayer (or any Node.js) package and its dependencies, use

npm update

Documentation

linkdescription
tutorialBegin with Node.js and mineflayer
FAQ.mdGot a question ? go there first
api.md
unstable_api.md		The full API reference
history.mdThe changelog for mineflayer
examples/Checkout all the mineflayer examples

Contribute

Please read CONTRIBUTING.md and prismarine-contribute

Usage

Videos

A tutorial video explaining the basic set up process for a bot can be found here.

If you want to learn more, more video tutorials are there, and the corresponding source codes for those bots is there.

tutorial 1 tutorial 2 tutorial 3 tutorial 4

Getting Started

Without a version specified, the version of the server will be guessed automatically. Without auth specified, the mojang auth style will be guessed.

Echo Example

const mineflayer = require('mineflayer')

const bot = mineflayer.createBot({
  host: 'localhost', // minecraft server ip
  username: 'Bot', // username to join as if auth is `offline`, else a unique identifier for this account. Switch if you want to change accounts
  auth: 'microsoft' // for offline mode servers, you can set this to 'offline'
  // port: 25565,              // set if you need a port that isn't 25565
  // version: false,           // only set if you need a specific version or snapshot (ie: "1.8.9" or "1.16.5"), otherwise it's set automatically
  // password: '12345678'      // set if you want to use password-based auth (may be unreliable). If specified, the `username` must be an email
})

bot.on('chat', (username, message) => {
  if (username === bot.username) return
  bot.chat(message)
})

// Log errors and kick reasons:
bot.on('kicked', console.log)
bot.on('error', console.log)

If auth is set to microsoft, you will be prompted to login to microsoft.com with a code in your browser. After signing in on your browser, the bot will automatically obtain and cache authentication tokens (under your specified username) so you don't have to sign-in again.

To switch the account, update the supplied username. By default, cached tokens will be stored in your user's .minecraft folder, or if profilesFolder is specified, they'll instead be stored there. For more information on bot options see node-minecraft-protocol's API doc.

Connecting to a Realm

To join a Realm that your Minecraft account has been invited to, you can pass a realms object with a selector function like below.

const client = mineflayer.createBot({
  username: 'email@example.com', // minecraft username
  realms: {
    // This function is called with an array of Realms the account can join. It should return the one it wants to join.
    pickRealm: (realms) => realms[0]
  },
  auth: 'microsoft'
})

See what your bot is doing

Thanks to the prismarine-viewer project, it's possible to display in a browser window what your bot is doing. Just run npm install prismarine-viewer and add this to your bot:

const { mineflayer: mineflayerViewer } = require('prismarine-viewer')
bot.once('spawn', () => {
  mineflayerViewer(bot, { port: 3007, firstPerson: true }) // port is the minecraft server port, if first person is false, you get a bird's-eye view
})

And you'll get a live view looking like this:

viewer

More Examples

exampledescription
viewerDisplay your bot world view in the browser
pathfinderMake your bot go to any location automatically
chestUse chests, furnaces, dispensers, enchantment tables
diggerLearn how to create a simple bot that is capable of digging blocks
discordConnect a discord bot with a mineflayer bot
jumperLearn how to move, jump, ride vehicles, attack nearby entities
ansiDisplay your bot's chat with all of the chat colors shown in your terminal
guardMake a bot guard a defined area from nearby mobs
multiple-from-fileAdd a text file with accounts and have them all login

And many more in the examples folder.

Modules

A lot of the active development is happening inside of small npm packages which are used by mineflayer.

The Node Way™

"When applications are done well, they are just the really application-specific, brackish residue that can't be so easily abstracted away. All the nice, reusable components sublimate away onto github and npm where everybody can collaborate to advance the commons." — substack from "how I write modules"

Modules

These are the main modules that make up mineflayer:

moduledescription
minecraft-protocolParse and serialize minecraft packets, plus authentication and encryption.
minecraft-dataLanguage independent module providing minecraft data for minecraft clients, servers and libraries.
prismarine-physicsProvide the physics engine for minecraft entities
prismarine-chunkA class to hold chunk data for Minecraft
node-vec33d vector math with robust unit tests
prismarine-blockRepresent a minecraft block with its associated data
prismarine-chatA parser for a minecraft chat message (extracted from mineflayer)
node-yggdrasilNode.js library to interact with Mojang's authentication system, known as Yggdrasil
prismarine-worldThe core implementation of worlds for prismarine
prismarine-windowsRepresent minecraft windows
prismarine-itemRepresent a minecraft item with its associated data
prismarine-nbtAn NBT parser for node-minecraft-protocol
prismarine-recipeRepresent minecraft recipes
prismarine-biomeRepresent a minecraft biome with its associated data
prismarine-entityRepresent a minecraft entity

Debug

You can enable some protocol debugging output using DEBUG environment variable:

DEBUG="minecraft-protocol" node [...]

On windows :

set DEBUG=minecraft-protocol
node your_script.js

Third Party Plugins

Mineflayer is pluggable; anyone can create a plugin that adds an even higher level API on top of Mineflayer.

The most updated and useful are :

  • pathfinder - advanced A* pathfinding with a lot of configurable features
  • prismarine-viewer - simple web chunk viewer
  • web-inventory - web based inventory viewer
  • statemachine - A state machine API for more complex bot behaviors
  • Armor Manager - automatic armor management
  • Dashboard - Frontend dashboard for mineflayer bot
  • PVP - Easy API for basic PVP and PVE.
  • Auto Eat - Automatic eating of food.
  • Auto Crystal - Automatic placing & breaking of end crystals.
  • Tool - A utility for automatic tool/weapon selection with a high level API.
  • Hawkeye - A utility for using auto-aim with bows.
  • GUI - Interact with nested GUI windows using async/await
  • Projectile - Get the required launch angle for projectiles
  • Movement - Smooth and realistic player movement, best suited for PvP
  • Collect Block - Quick and simple block collection API.

But also check out :

  • radar - web based radar interface using canvas and socket.io. YouTube Demo
  • auto-auth - chat-based bot authentication
  • Bloodhound - determine who and what is responsible for damage to another entity
  • tps - get the current tps (processed tps)
  • panorama - take Panorama Images of your world
  • player-death-event - emit player death event in Mineflayer.

Projects Using Mineflayer

Testing

Testing everything

Simply run:

npm test

Testing specific version

Run

npm run mocha_test -- -g <version>

where <version> is a minecraft version like 1.12, 1.15.2...

Testing specific test

Run

npm run mocha_test -- -g <test_name>

where <test_name> is a name of the test like bed, useChests, rayTrace...

Example

npm run mocha_test -- -g "1.18.1.*BlockFinder"

to run the block finder test for 1.18.1

License

MIT

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