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Tariq Mehmood
Tariq Mehmood

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Build a Smart Minecraft Auto-Farm Bot

#git #webdev #javascript #programming

If you’re like me, you love the grind in Minecraft… until you don’t.

Planting, harvesting, replanting—it’s satisfying at first, but once you’ve done it 40 times, it gets old. That’s when I thought:

“Wait a second… I write bots for the web. Why not for Minecraft?”

So I did. With a bit of Node.js, a fantastic library called mineflayer
, and some trial and error, I built a smart auto-farming bot that logs into my server, walks over to my farm, harvests crops, replants them, and chills until the next cycle.

What You’ll Need:

  • Before diving in, here's what you'll need:
  • A Minecraft Java Edition account
  • A local or hosted Minecraft server (supporting bots)
  • The mineflayer library
  • A basic understanding of JavaScript and game loops

Step 1: Set Up Your Project

Start fresh:

mkdir mc-auto-farmer
cd mc-auto-farmer
npm init -y
npm install mineflayer vec3
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Then create your entry file:

touch farmer.js
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Step 2: Connect to the Minecraft Server

Let’s start simple — login to Minecraft APK and spawn into the world.

// farmer.js
const mineflayer = require('mineflayer');

const bot = mineflayer.createBot({
  host: 'localhost', // your server IP
  port: 25565,        // default Minecraft port
  username: 'FarmBot3000' // no auth needed for offline servers
});

bot.on('spawn', () => {
  console.log('🧑‍🌾 Bot has spawned and is ready to farm!');
});
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Run with:

node farmer.js
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Boom. You're in.

Step 3: Walk to the Farm

Now we need to guide the bot to the crop area. We’ll manually define the coordinates.

const { Vec3 } = require('vec3');

const farmLocation = new Vec3(100, 64, 100); // change to your farm's coords

bot.on('spawn', () => {
  bot.chat('Heading to the farm!');
  bot.pathfinder.setGoal(new GoalBlock(farmLocation.x, farmLocation.y, farmLocation.z));
});
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But wait — we forgot something. pathfinder!

Install and load it:

npm install mineflayer-pathfinder
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And require it properly:

const { pathfinder, Movements, goals } = require('mineflayer-pathfinder');
const { GoalBlock } = goals;

bot.loadPlugin(pathfinder);

bot.on('spawn', () => {
  const defaultMove = new Movements(bot);
  bot.pathfinder.setMovements(defaultMove);
  bot.pathfinder.setGoal(new GoalBlock(farmLocation.x, farmLocation.y, farmLocation.z));
});
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Now your bot will navigate to the farm like a good little NPC.

Step 4: Harvest + Replant Crops

This is the fun part.

We'll detect when the bot arrives, then scan for crops (like wheat) that are fully grown.

bot.on('goal_reached', async () => {
  bot.chat('🌾 Arrived at the farm. Looking for ripe crops...');

  const crops = bot.findBlocks({
    matching: block => block.name === 'wheat' && block.metadata === 7,
    maxDistance: 6,
    count: 20,
  });

  for (const pos of crops) {
    const block = bot.blockAt(pos);

    if (block) {
      await bot.dig(block); // harvest
      await bot.placeBlock(bot.blockAt(pos.offset(0, -1, 0)), new Vec3(0, 1, 0)); // replant
    }
  }

  bot.chat('✅ Farming complete. Waiting for next cycle...');
});
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We’re using metadata === 7 because that means the wheat is fully grown.

Step 5: Loop It with a Timer

Let’s run this farming cycle every 5 minutes.

setInterval(() => {
  bot.chat('⏳ Checking crops again...');
  bot.pathfinder.setGoal(new GoalBlock(farmLocation.x, farmLocation.y, farmLocation.z));
}, 5 * 60 * 1000);
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Optional: Add random intervals to make it less bot-like.

Final Thoughts

This project was a blast to build. Not only did I automate one of Minecraft’s most repetitive tasks, but I also learned how accessible Minecraft automation is with JavaScript.

Where to Take This Next

  • Add chest storage logic (deposit harvested wheat)
  • Support multiple crop types (carrots, potatoes, etc.)
  • Build a Discord bot to report farming stats
  • Use mineflayer’s inventory API to manage seeds/tools
  • Detect hostile mobs and run away

Bonus Ideas

  • Create a farming network of multiple bots
  • Connect your farm bot with a weather plugin (don’t farm in the rain)
  • Auto-craft bread from harvested wheat
  • Visualize farm productivity with a dashboard

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