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Temporary Issue Notice

The mod is currently not functioning properly because of a database-related issue.

I am already working on a solution and will fix the problem as quickly as possible. An update will be released once the issue has been resolved.

Thank you for your patience.

Seamless - Play Together, Effortlessly

Tired of complicated server setups? Seamless transforms multiplayer gaming by eliminating the technical headaches. No port forwarding nightmares, no router configuration struggles – just pure gaming fun with your friends!

What Makes Seamless Special?

Seamless revolutionizes how you play Minecraft with friends by bringing server hosting directly into your game. Using cutting-edge P2P technology, it automatically establishes connections between players, even when both are behind NAT or firewalls. Say goodbye to technical barriers and hello to instant multiplayer!

Key Features

🎯 One-Click Server Hosting

Launch a multiplayer server directly from Minecraft – no separate server software, no console commands, no complexity. Just click "Host Server" and you're ready to play!

🔓 Automatic Port Forwarding

Forget about router configuration! Seamless automatically handles port forwarding using UPnP technology. If automatic setup isn't possible, you'll get clear, easy-to-follow instructions.

💬 Smart Invite System

Share a simple 6-digit code instead of complicated IP addresses. Your friends can join in seconds by entering the code – it's that simple!

👥 Integrated Friend Management (Coming Soon)

Manage your friends directly in-game with real-time status updates and persistent friend lists.

🌐 Advanced P2P Connections

Modern networking technology that works even behind NAT and firewalls. Direct peer-to-peer connections with automatic fallback to relay servers if needed.

🔄 Mod Compatibility Checker

Never join an incompatible server again!

Automatic mod detection on host and client
Pre-join compatibility checks – see warnings before connecting
Prevent crashes caused by mod mismatches
Clear mod requirement lists for easy troubleshooting

⚡ Real-Time Session Management

Live player counts and session status
Automatic session cleanup after 1 hour of inactivity
Session restoration – rejoin seamlessly after disconnects

🛠️ Cross-Platform Support

Works with both Fabric AND NeoForge – same great features, same smooth experience, your choice of mod loader!

📦 Quick Start Guide

Hosting Your First Server

Open the game menu
Click "Server"
Hit "Start Server"
Share your invite code or server address with friends
Start playing together! 🎉

Joining a Friend's Server

Currently, joining works via 6-digit invite codes:

Get the code from your friend hosting the server
Open the join menu in Seamless
Enter the 6-digit code
Connect instantly!

Note: The friend list feature is currently in development. For now, use invite codes to join servers.

🔧 Technical Details

Network Architecture

Standard Minecraft protocols with automatic port detection
Multi-tier connection strategy (direct → hole-punch → relay)
RFC 5389-compliant STUN client implementation

P2P Technology

STUN servers for NAT traversal
UDP hole punching for firewall bypass
TCP-over-UDP tunneling with automatic fallback

Data Storage

Friend lists: config/seamless/friends.json
Server settings: Local configuration files

🤝 Community & Support

Need help? Have suggestions? Found a bug?

Report issues on CurseForge
Leave comments on CurseForge – i read every message!
Share your experience – help me improve Seamless

🚧 Currently in Development

The following items reflect the current direction of development. These are planned features, not guarantees. Stability comes first.

Core improvements

In-game friends menu
Inviting friends directly without links
Minimal UI with no social features
No accounts, cosmetics, shops, or external services
Calm behavior without spam notifications
Focus on hosting and joining only

Multiplayer and co-op features

Basic multiplayer commands
Host-only permissions
Session-based commands like kick, invite, and lock session
Clear host indication
Better session lifecycle handling
Optimized for small groups
Target: stable sessions with up to 8 players

Mod and Voice support

Improved modpack compatibility
Support for common mod setups
Simple Voice Chat compatibility

Versions

Planned support for additional versions:

1.21.11
1.21.4
1.21.1
1.21
1.20.4
1.20.1
1.19.2
1.12.2
1.7.10

The focus is on supporting the most important versions first, with others coming later.

Modpacks

Seamless is explicitly allowed to be used in modpacks.

If you want to include Seamless in a public or private modpack, feel free to do so. The only requirement is that all players in a session use the same mod setup.

If you run into issues, incompatibilities, or edge cases while integrating Seamless into a modpack, modpack creators are very welcome to reach out. Feedback from modpack authors is appreciated and helps improve compatibility.

📄 License

💎 Credits

Developed with ❤️ by Ecentrix

Special thanks to the Minecraft modding community and everyone who contributes to making multiplayer gaming more accessible!

🎮 Ready to play without limits?

Download Seamless today and experience multiplayer the way it should be!

No technical knowledge required – just install and play.

Seamless – Serverless Multiplayer