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Minecraft Servers (Paper, Velocity & Bungee)

Stop VPN and proxy connections before they join your game world.

ProxyTracer checks joining player IPs against the high-accuracy ProxyTracer API  and allows you to block, warn, or log malicious connections. Perfect for stopping ban evasion, alts, and VPN-based bot raids.

Preview

In-Game Kick ScreenConsole Warning Alert
Minecraft Kick ScreenConsole Warning Log

Why ProxyTracer?

  • Real-Time Detection: Accurate checks against proxytracer.com’s constantly updated residential and public VPN databases.
  • Multi-Platform Native: Dedicated integrations for single servers (Paper/Spigot) and multi-server networks (Velocity or BungeeCord/Waterfall).
  • Fast Performance: Built-in in-memory caching saves API credits and ensures returning players connect instantly.
  • Smart Whitelist: Whitelist bypass commands for trusted player names and network IPs.
  • Discord Alerts: Log blocked VPN joins directly to your staff channels.
  • Branded Kick Screen: Prompts players with a professional block message citing proxytracer.com.

Which jar do I install?

Your setupInstall this jarLocation
Single Paper / Spigot / Purpur serverproxytracer-bukkit-1.2.0.jarGame server plugins/
Velocity proxy networkproxytracer-velocity-1.2.0.jarProxy server plugins/ (Do not install on Paper)
BungeeCord / Waterfall networkproxytracer-bungee-1.2.0.jarProxy server plugins/ (Do not install on Paper)
Important

Rule: Install ProxyTracer where the real client IP is visible. If you run a proxy network (Velocity or BungeeCord), install it only on the proxy. Do not run both Bukkit and Velocity plugins in block mode (this results in double-billing and redundant checks).

Quick Setup (60 Seconds)

  1. Get a free API key at proxytracer.com .
  2. Download the correct jar for your setup from Releases.
  3. Place the jar in your server’s plugins/ directory and start it once.
  4. Set your API key directly in-game or via the console: 
    /proxytracer set your_api_key_here
    (This automatically writes the key to your config file and reloads the plugin).
  5. Verify the connection by running: 
    /proxytracer status

Configuration Highlight

mode: "block"          # Action when proxy detected: block | warn | log
 
api:
  base-url: "https://api.proxytracer.com/v1"
  key: "proxy_your_key_here"
  on-error: "allow"    # Fail-open policy if API goes offline: allow | block | warn
  timeout-ms: 2000
 
cache:
  enabled: true
  ttl-minutes: 1440    # Cache IP check result for 24 hours
  max-entries: 10000
 
discord:
  enabled: false
  webhook-url: ""
  notify-blocked: true

Commands & Permissions

All commands are prefixed with /proxytracer:

  • /proxytracer set <api_key> — Set the API key directly, saving it to config.yml and reloading.
  • /proxytracer status — Check configuration status and API credentials.
  • /proxytracer check <ip> — Query an IP address manually.
  • /proxytracer cache clear — Clear the local IP cache.
  • /proxytracer reload — Reload the configuration file.
  • /proxytracer whitelist name add|remove|list [player] — Exempt players from checks.
  • /proxytracer whitelist ip add|remove|list [ip] — Exempt network IPs from checks.

Permissions:

  • proxytracer.admin — Access to reload, status, and administration commands.
  • proxytracer.bypass — Players with this permission bypass check requirements during pre-login.
  • proxytracer.notify — Staff receive in-game warnings when a VPN user is logged or warned.

(Note: By default, these permissions are assigned only to server Operators (OPs). To grant these permissions to other players or staff groups, use a permissions manager plugin like LuckPerms).

Compatibility & Requirements

  • Java Version: Java 17 or higher (fully tested on Java 17, 21, and 22). The plugin is compiled targeting Java 17.
  • Server Software Support:
    • Paper / Spigot / Purpur: Minecraft 1.13 to 1.21.x (specifically tested and verified working on Paper 1.21).
    • Velocity: 3.x
    • BungeeCord / Waterfall: Modern builds.
  • API Access: A free or paid API key registered at proxytracer.com .

Troubleshooting: Real IP Issues (127.0.0.1)

If your logs show every joining player connecting from 127.0.0.1, the ProxyTracer API cannot scan them. This indicates your hosting network layout or front-end proxy is masking the incoming player IPs.

How to Fix:

  1. For Proxy Networks (Velocity / Bungee):
    • Deploy ProxyTracer only on the gateway proxy (Velocity/Bungee).
    • Ensure player info forwarding is active (player-info-forwarding-mode = "modern" in velocity.toml or ip_forward: true in Bungee’s config.yml) so the backend game nodes receive the real IP.
  2. For Shared Hosts (e.g., TickHosting panel proxies):
    • If your host forwards connection headers via Proxy Protocol, enable it inside your Paper configuration:
      • Open config/paper-global.yml
      • Set: 
        proxies:
  proxy-protocol: true
      • Restart the server.
      • Warning: Do not turn this on unless your host explicitly supports it; configuring it incorrectly will prevent all players from joining.

Pricing & API Quotas

The ProxyTracer Minecraft plugins are 100% free. Detection requires a connection to the ProxyTracer API:

  • Free Tier: 100 checks/month for small SMPs and development.
  • Starter (€3/mo): Perfect for growing public servers.
  • Pro (€9/mo) / Scale (€39/mo): Intended for established networks.

Create your key & select a plan: proxytracer.com 

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