This is a follow-up to our previous announcement about npm replication APIs.

The new replication feed APIs are now live. While the legacy feeds will remain available—with limitations and scheduled brownout periods—until May 29, 2025, we strongly encourage all users to begin transitioning to the new APIs as soon as possible.

To access the updated feeds ahead of the deprecation, include the npm-replication-opt-in header with a value of true in your requests. This will route your traffic to the new APIs, bypassing the legacy feeds and avoiding any disruptions during brownout phases.

Please note that starting May 29, 2025, the legacy feeds will be fully deprecated. After this date, all requests to the replication feeds will automatically be served by the new APIs, regardless of header usage.

This change is part of our ongoing efforts to improve the performance and reliability of our services. We appreciate your understanding and cooperation during this transition.

Check out the migration guide and join the discussion in GitHub Community.