# Previous KCL version documentation
<a name="kcl-archive"></a>

The following topics have been archived. To see current Kinesis Client Library documentation, see [Use Kinesis Client Library](kcl.md).

**Important**  
Amazon Kinesis Client Library (KCL) versions 1.x and 2.x are outdated. KCL 1.x will reach end-of-support on January 30, 2026. We **strongly recommend** that you migrate your KCL applications using version 1.x to the latest KCL version before January 30, 2026. To find the latest KCL version, see [Amazon Kinesis Client Library page on GitHub](https://github.com/awslabs/amazon-kinesis-client). For information about the latest KCL versions, see [Use Kinesis Client Library](kcl.md). For information about migrating from KCL 1.x to KCL 3.x, see [Migrating from KCL 1.x to KCL 3.x](kcl-migration-1-3.md).

**Topics**
+ [KCL 1.x and 2.x information](shared-throughput-kcl-consumers.md)
+ [Develop custom consumers with shared throughput](shared-throughput-consumers.md)
+ [Migrate consumers from KCL 1.x to KCL 2.x](kcl-migration.md)