# Patching libraries to instrument downstream calls
Patching libraries

**Note**  
X-Ray SDK/Daemon Maintenance Notice – On February 25th, 2026, the AWS X-Ray SDKs/Daemon will enter maintenance mode, where AWS will limit X-Ray SDK and Daemon releases to address security issues only. For more information on the support timeline, see [X-Ray SDK and Daemon Support timeline](xray-sdk-daemon-timeline.md). We recommend to migrate to OpenTelemetry. For more information on migrating to OpenTelemetry, see [Migrating from X-Ray instrumentation to OpenTelemetry instrumentation ](https://docs.aws.amazon.com/xray/latest/devguide/xray-sdk-migration.html).

To instrument downstream calls, use the X-Ray SDK for Ruby to patch the libraries that your application uses. The X-Ray SDK for Ruby can patch the following libraries.

**Supported Libraries**
+ `[net/http](https://ruby-doc.org/stdlib-2.4.2/libdoc/net/http/rdoc/Net/HTTP.html)` – Instrument HTTP clients.
+ `[aws-sdk](https://aws.amazon.com/sdk-for-ruby)` – Instrument AWS SDK for Ruby clients.

When you use a patched library, the X-Ray SDK for Ruby creates a subsegment for the call and records information from the request and response. A segment must be available for the SDK to create the subsegment, either from the SDK middleware or a call to `XRay.recorder.begin_segment`.

To patch libraries, specify them in the configuration object that you pass to the X-Ray recorder.

**Example main.rb – Patch libraries**  

```
require 'aws-xray-sdk'

config = {
  name: 'my app',
  patch: %I[net_http aws_sdk]
}

XRay.recorder.configure(config)
```