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December 12, 2025 - Upcoming deprecation of public Prebid Cache

On April 30, 2026, the Microsoft-hosted (formerly AppNexus) public Prebid Cache will be deprecated. Prebid.js and Prebid Server implementations using this cache to store and retrieve video creatives need to migrate to another solution.

The specific cache URL is http://prebid.adnxs.com/pbc.

Alterative local caching options are detailed in the Prebid.org documentation.

Examples include:

  • Local client-side caching (Prebid.js)
  • Client-side caching
  • Server-side caching using a host other than Microsoft/AppNexus

Local caching is the preferred method offering a smoother customer experience and reduced bandwidth for all participants. We'll continue to work through any niche use cases with the community, as core contributors to Prebid.js.

Please reach out to our Support team or your account manager with any questions.