Service Extensions documentation
Service Extensions is an extensibility product that enables the users of
Google Cloud applications, such as Media CDN and Application Load Balancer, to
provide programmability and extensibility at the edge and on load balancing data paths.
Learn more.
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Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-08-29 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-29 UTC."],[],[],null,["# Service Extensions documentation\n================================\n\n[Read product documentation](/service-extensions/docs/overview)\nService Extensions is an extensibility product that enables the users of\nGoogle Cloud applications, such as Media CDN and Application Load Balancer, to\nprovide programmability and extensibility at the edge and on load balancing data paths.\n[Learn more](/service-extensions/docs/overview).\n[Get started for free](https://console.cloud.google.com/freetrial) \n\n#### Start your proof of concept with $300 in free credit\n\n- Get access to Gemini 2.0 Flash Thinking\n- Free monthly usage of popular products, including AI APIs and BigQuery\n- No automatic charges, no commitment \n[View free product offers](/free/docs/free-cloud-features#free-tier) \n\n#### Keep exploring with 20+ always-free products\n\n\nAccess 20+ free products for common use cases, including AI APIs, VMs, data warehouses,\nand more.\n\nDocumentation resources\n-----------------------\n\nFind quickstarts and guides, review key references, and get help with common issues. \nemoji_objects\n\n### Concepts\n\n-\n\n [Service Extensions overview](/service-extensions/docs/overview)\n\n-\n\n [Cloud Load Balancing extensions overview](/service-extensions/docs/lb-extensions-overview)\n\n-\n\n [Callouts overview](/service-extensions/docs/lb-extensions-overview)\n\n-\n\n [Plugins overview](/service-extensions/docs/lb-extensions-overview)\n\nformat_list_numbered\n\n### Guides\n\n-\n\n [Configure a callout backend service](/service-extensions/docs/configure-callout)\n\n-\n\n [Configure an authorization extension](/service-extensions/docs/configure-authorization-extensions)\n\n-\n\n [Configure a route extension](/service-extensions/docs/configure-route-extensions)\n\n-\n\n [Configure a traffic extension](/service-extensions/docs/configure-traffic-extensions)\n\n-\n\n [Create a plugin](/service-extensions/docs/create-plugin)\n\n-\n\n [Attach a plugin to a route](/service-extensions/docs/attach-plugins-to-routes)\n\ngroup_work\n\n### References and resources\n\n-\n\n [REST API and gcloud](/service-extensions/docs/apis)\n\n-\n\n [CEL matcher language reference](/service-extensions/docs/cel-matcher-language-reference)\n\n-\n\n [Code samples for plugins](/service-extensions/docs/plugin-code-samples)\n\n-\n\n [Quotas and limits](/service-extensions/docs/quotas)\n\n-\n\n [Release notes](/service-extensions/docs/release-notes)"]]
