Run your server.
Stop installing mods for your players.
PackRelay turns your modpack into a signed manifest. Players join, the launcher syncs, you stop being tech support.
Two ways to run a modded server
- •ZIPs scattered across Discord channels and Google Drive folders
- •Players DM you at 2am when a mod doesn't sync
- •Pack updates break someone's install every single time
- •No way to prove the files in a player's game match yours
- •Onboarding a new player is a 30-minute screenshare
- •One signed manifest. One source of truth.
- •Players auto-sync the second they join your server
- •Updates roll out cleanly — diff-only downloads, never a full reinstall
- •Cryptographic signatures prove the pack hasn't been tampered with
- •Onboarding is “click the launcher, click your server, play”
Four commands. One pack. Every player synced.
- 1
Generate a signing key
The PackRelay CLI mints an Ed25519 keypair. The public half lives on packrelay.cloud; the private half stays on your machine. Lose neither.
- 2
Author the manifest
Drop your mod folder into the CLI. It hashes every file, picks up your description and version, and writes a manifest.json.
- 3
Sign and publish
One command signs the manifest with your key and pushes it. The pack gets scanned, then becomes available for attachment.
- 4
Attach to your server(s)
Point one server — or several — at the published version. Player launchers pick up the new manifest automatically on their next connect.
The CLI is in active development. CLI shape may shift before 1.0.
Tooling that scales with your community
Run a PvE box and a PvP box on the same pack? Attach once, publish once, both stay in sync.
Publish 1.4.3 without breaking your 1.4.2 players. Roll forward at your own pace.
Delegate publish access to co-admins. They sign with their own keys, audited under your org.
Players see your publisher name in the launcher before any file lands. Reputation compounds.
Every published pack goes through automated scanning before it's available — see Terms §4.3.
Opt in to PackRelay's public pack directory and let new players discover your server.
Free to start. Upgrade when your pack outgrows it.
Pricing is per publisher account, not per pack or per server. One subscription covers everything you ship.
- 10 GB total pack storage
- 50 GB/month download bandwidth
- Most recent 5 versions per pack
- Public packs only
- All publishing + signing tools
- 100 GB total pack storage
- 500 GB/month download bandwidth
- Unlimited version history
- Private packs
- Everything in Free
- Higher storage + bandwidth caps
- Custom contract terms
- Priority support
- Everything in Pro
Bring your pack
Register a server account and publish your first pack. We'll handle the sync; you get back to running your world.