Read about the Http support in the reference guide

See the list of available samples:

Sample	Description	Sources
sample-swagger	OpenAPI sample - Auto generate tests from Open API
sample-http-form-data	Http form data sample - Exchange form data via Http GET/POST
sample-http-basic-auth	Http basic auth sample - Basic authentication on client and server components
sample-http-loadtest	Http load testing sample - Calls REST API on Http server with multiple threads for load testing
sample-https	Https sample - Shows how to use SSL connectivity as a client and server
sample-http	Http REST sample - Shows REST API calls as a client