Paper 1.21 & Folia ready — powered by Gemini & Claude AI

Build Minecraft plugins
powered by AI.

Describe your idea in plain English. StackNest generates production-ready Java plugins — complete with plugin.yml, event handlers, and clean code — in seconds.

Start building free See how it works

TreasureHunt.java — generated by StackNest

@SuppressWarnings("unused")
public class TreasureHunt extends JavaPlugin implements Listener {

    private final Map<UUID, Location> activeTreasures = new HashMap<>();

    @Override
    public void onEnable() {
        Objects.requireNonNull(getCommand("hunt")).setExecutor(this);
        Bukkit.getPluginManager().registerEvents(this, this);
        getLogger().info("TreasureHunt enabled");
    }

    @EventHandler
    public void onTreasureFind(PlayerInteractEvent e) {

Features

Everything you need to ship faster

From first idea to deployable .jar — StackNest handles the tedious parts of plugin development.

⚡

AI Plugin Generation

Describe your plugin in natural language. The AI outputs complete, working Java with proper package structure, plugin.yml, and event handling.

🔄

Context-Aware Healing

Build errors? The healing system reads compile output, diagnoses the root cause, and rewrites broken sections automatically — up to 3 passes.

Automatic

🌐

Tiered AI Engine

Three-layer fallback: your fine-tuned local model runs first (fastest, free). Free users fall back to Google Gemini. Premium users unlock Claude for the highest quality code.

Free & Premium

🌐

Community Gallery

Browse plugins generated by the community. Share your own creations — with source, description, and GitHub links — to help others learn and build faster.

New

✏️

Built-in Plugin Editor

Edit generated code right in the browser with full syntax highlighting, multi-file tabs, one-click JAR export, and optional source ZIP download — no IDE required.

New

📋

Server Log Analyser

Drop your latest.log or paste crash output. AI diagnoses errors, identifies root causes, and suggests fixes instantly.

New

📦

Maven Project Export

Export a deployable JAR by default, or an optional Maven source ZIP when you explicitly need project files.

How it works

From idea to .jar in three steps

Describe your plugin

Type a plain-English description and pick your plugin type and target API. No boilerplate, no Java knowledge required to get started.

AI generates the code

StackNest builds the Java source, plugin.yml, and pom.xml. The feedback loop auto-heals compile errors before you see the result.

Edit, validate, and ship

Open the code in the built-in editor, run a deep validation pass via Kimi AI, then download a deployable JAR (or source ZIP when needed).

$ POST /api/generate

┃ instruction: "economy plugin with shops"

┃ target_api: paper-1.21

▶ Routing to local fine-tuned model...

▶ Local offline → Gemini 2.0 Flash (free tier)...

▶ Compiling EconomyPlugin.java...

▶ Validating plugin.yml...

✔ BUILD SUCCESS — 0 errors, 0 warnings

✓ attempts: 1 elapsed: 38s source: gemini

Pricing

Start free, scale when you need to

No credit card required to get started. Upgrade any time for higher limits and cloud AI features.

Free

£0

forever — no credit card

3 plugin generations / month
20 prompt previews / month
Paper & Spigot only
Built-in plugin editor
Maven & Gradle export
Log analyser (50 lines)
Gemini AIGemini
Folia / Velocity support
Deep code validation
Claude quality

Get started free

Pro

£9

per month, billed monthly

100 generations / month
Unlimited prompt previews
All platforms (Folia, Velocity)
Claude AI generationClaude
Deep code validationKimi K2
Context-Aware Auto-Healing
Full log analyser
Version history (30 days)
Priority queue
Discord support
Team seats
API access

Start Pro — £9/mo

Studio

£29

per month, per workspace

300 generations / month
Everything in Pro
Up to 5 team seats
Shared plugin history
Custom plugin templates
Claude remembers your style
Unlimited version history
Priority Discord support
SLA uptime guarantee
Full API access

FAQ

Common questions

Yes. Every generation runs through a real Java compiler (javac) against the PaperMC API. If compilation fails, the feedback loop automatically heals the code and retries up to 3 times. Plugins marked "Compiled Successfully" have 0 errors and are ready to drop into your server.

StackNest targets Paper 1.21 by default, using the modern Adventure API for components. Folia-compatible generation is also supported — just select the Folia option to get RegionScheduler and async-safe scheduler calls.

StackNest uses a 3-layer AI engine. First, it runs your local fine-tuned model (fastest, zero cloud cost). If unavailable, free users fall back to Google Gemini 2.0 Flash — which has a generous free daily quota so there's no cost to you. Premium users instead use Anthropic Claude for significantly higher code quality. Kimi K2.5 handles deep validation and auto-healing on all tiers.

Absolutely. Every generated plugin can be opened in the built-in web editor, which provides Java and YAML syntax highlighting, multi-file tabs, one-click deployable JAR download, and optional source ZIP export — no local tooling required.

Free accounts get 3 full plugin generations per month and 20 prompt previews. The editor, log analyser, and download features are available on the free tier with no restrictions. Author metadata on free-tier plugins includes "StackNest" as a contributor.

Build Minecraft pluginspowered by AI.