Hi@akhtar,
HTTP package contains a set of high-level functions and classes that make it easy to consume HTTP resources. It's multi-platform and supports mobile, desktop, and the browser. You can find the package in the below-given link.
https://pub.dev/packages/http
Find the package name in the above link. Copy the name and paste it in your "pubspec.yaml" file. Now run the below command in your command line. It will download automatically.
$ flutter pub get
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