01 / AUTHENTICATION
Real Microsoft sign-in
OAuth authorization-code flow with PKCE runs in the system browser. Licensed Minecraft Java ownership and valid game authentication are mandatory before launch; no offline/cracked-account mode.
Windows desktop · v1.0 development build
A simpler way into Vaultcraft.
A dedicated Windows launcher for Minecraft: Java Edition owners. One place for licensed sign-in, an approved Fabric profile, integrity-checked updates, and a direct connection to our community server.
Development status: Independent Windows installer and automated tests are available internally. Minecraft Services AppID approval, live game sign-in, a public installer signature, and release publishing are still pending. No public launcher download is offered yet.
Product overview
Built for an easier first session.
A Windows-first experience powered by an established Minecraft launcher library, with a distinct Vaultcraft interface.
02 / INSTALLATION
Managed game profile
The installer uses a separate Vaultcraft game directory and prepares Minecraft Java, Fabric, the verified client mod, and a compatible Java runtime—without changing an existing Prism installation.
03 / UPDATES
Verified releases
Signed release manifests and exact SHA-256 checks validate launcher-managed assets before activation. Repair and independent release directories are built into the update design.
Player journey
Ownership first. Play second.
- Install the approved Windows build. Public distribution will open only after release certification and signing.
- Sign in with your own Microsoft account. Authentication happens in the system browser; Vaultcraft does not request the account password.
- Verify Minecraft Java ownership. Microsoft, Xbox, and Minecraft Services must authorize your account; license checks are never bypassed.
- Join the Vaultcraft community. Minecraft account authentication does not replace Discord applications, age eligibility, or the server whitelist.
Current status
Transparent development.
Minecraft Services AppID approval pending
On November 11, 2026, our real Windows browser callback completed successfully, but Minecraft Services returned AzureAppNotPermitted. Approval has been requested through the official AppID review process. We do not claim gameplay login is certified.
Technical facts
A real application, independently developed.
- Official project name
- Vaultcraft Launcher
- Platform
- Windows desktop (Windows-first)
- App version
- 1.0 development / unsigned review-only installer
- Minecraft edition
- Java Edition (legitimate paid entitlement required)
- Sign-in
- Microsoft OAuth 2.0 with PKCE, localhost browser callback
- Foundation
- minecraft-launcher-lib, PySide6, Fabric loader
- Server
- play.vaultcraft.org:25630 · 18+ whitelist community
- Owner support
- Help Center · Vaultcraft Discord
Engineering evidence — November 11, 2026
Build + automated checks
24 Python tests passed on Windows. 23 Python tests passed on Linux, plus 1 Windows-only GUI test skipped there. Seven Meridian API contract tests passed. The unsigned Inno Setup installer compiled successfully.
What is not certified
Microsoft/Minecraft Services AppID allow-list, live Minecraft entitlement and server join, production code signing, final curated Java/client-mod package, and production Meridian update/diagnostics routes.
These limitations are release gates, not optional user security settings.
Data and trust
Privacy is part of the design.
Credentials stay under your control
Microsoft passwords are entered only with Microsoft's sign-in service. The Windows application stores its refresh token in the OS credential vault, and local account identification in app data. Vaultcraft's website and Meridian do not receive those launcher sign-in tokens.
Diagnostics require a decision
No game logs or system reports are automatically uploaded by the launcher. Reports can be saved locally; the planned Meridian intake asks for explicit consent and remains disabled pending secure release and support procedures.
Who we are
A long-running community, not an official game launcher.
Vaultcraft is an independent, 18+ Minecraft Java server community with a permanent Main World established in 2020. Our website, Discord community, and player support services are powered by Meridian. The dedicated launcher is intended to make access simpler for players who already own Java Edition.
Vaultcraft Launcher is an independent community application, not developed, approved, sponsored, or endorsed by Mojang Studios, Microsoft, or Xbox. Minecraft and related marks belong to their respective owners. The launcher does not provide a game license; Minecraft: Java Edition ownership and valid authentication are required.