Composer only allows one key per repository. RexSync lets you use multiple keys, syncing everything to your own private package source.
Standard Composer Limitation:
Only one key per repository domain is allowed. Multiple keys cannot be used together.
Only one key can be active at a time
Magento 2 projects rely on dozens of repositories with different authentication requirements. Composer's one-key-per-domain limitation creates a nightmare for developers and agencies.
Different parties with their own keys for the same repositories
Legacy projects with accounts from previous owners
Builds fail due to missing keys or blocked bots
Magento 2 projects typically use 10-30 different repositories from various vendors.
Each repository requires its own authentication credentials, often tied to specific accounts.
Composer only supports one authentication key per domain, making multi-client work impossible.
Build pipelines break when they can't access all required repositories with the right credentials.
A comprehensive solution that transforms your Composer workflow from complex to simple.
RexSync continuously monitors your configured repositories and automatically syncs all available packages to your private Git repository.
Regular updates on your schedule
Sync on demand when needed
All packages in Git with history
your-rexsync-repo.git
Your keys stay encrypted and secure in our infrastructure
Parallel downloads and intelligent caching for maximum speed
Perfect integration with your deployment pipelines
Your packages are available even when the original repositories are down
Composer limits you to 1 key per repository. RexSync lets you use unlimited keys.
The limitation we solve
Standard Composer Limitation:
Only one key per repository domain is allowed. Other keys are blocked.
RexSync supports every repository in the Magento 2 ecosystem, from official Marketplace to all third-party vendors.
RexSync supports any Composer repository that requires authentication. If you don't see your specific repository listed, you can still add it to your RexSync setup.
Add your composer repositories and multiple keys via our interface
We fetch all packages and commit them to your Git repository
Use your repo with Packeton, Satis or direct Git install
Experience how RexSync handles multiple repositories and authentication keys in this interactive demo.
Add the repositories you want to sync and their authentication keys.
https://repo.magento.com
https://repo.amasty.com
Host your packages locally on your own server. Zero downtime, even from us.
Download and host all your packages on your own infrastructure. Complete independence from any external service, including RexSync itself.
Your builds work even when the internet is down
All packages stored on your own servers and infrastructure
Local network speeds for all package downloads
Keep sensitive packages behind your own firewall
Join our early access program and get notified when self-hosted RexSync becomes available.
"RexSync completely solved our Composer authentication nightmare. We were managing 15+ different keys across multiple projects, and it was impossible to maintain. Now everything just works seamlessly."

Choose the perfect plan for your needs. Always flexible to scale.
Perfect for trying out RexSync
For growing teams and agencies
For large agencies and enterprises
All plans include:
No more broken builds. No more key hassle.