- Apache HttpClient: https://mirrors.ucr.ac.cr/apache//httpcomponents/httpclient/binary/httpcomponents-client-5.0.3-bin.zip
- SL4J API: https://repo1.maven.org/maven2/org/slf4j/slf4j-api/1.7.9/slf4j-api-1.7.9.jar
- Jackson JSON: https://jar-download.com/artifacts/com.fasterxml.jackson.core
- Logback:
If you are not using any dependency manager tool, download each of the jar and put them in the library folder of the project and make sure to add them to the classpath.