Open Source BSD API Clients

The gSOAP toolkit is an extensive suite of portable C and C++ software to develop XML Web services with powerful type-safe XML data bindings. Easy-to-use code-generator tools allow you to directly integrate XML data in C and C++. Serializes native application data in XML. Includes WSDL/XSD schema binding and auto-coding tools, stub/skeleton compiler, Web server integration with Apache module and IIS extension, high-performance XML processing with schema validation, fast MIME/MTOM streaming, SOAP and REST Web API development, WS-* protocols (WS-Security, WS-Policy, WS-ReliableMessaging, etc), XML-RPC and JSON. Licensed under GPLv2. Visit the developer center with guides, tutorials, and examples at www.genivia.com/dev.html The documentation of the toolkit, libraries, plugins and more is available at www.genivia.com/docs.html Commercial-use licenses and expert technical support services are available at competitive pricing levels, please visit www.genivia.com/products.html

The Google API PHP Client is an official PHP client library for accessing Google APIs such as Gmail, Calendar, Drive, YouTube, and more. It handles OAuth 2.0 authentication, RESTful API calls, and JSON parsing, making it easier for PHP applications to interact with Google’s ecosystem.

The Email Checker PHP SDK is part of the Easy Email Verification - URL Checker ecosystem, designed to help developers integrate real-time email verification into their PHP applications. It uses the Easy Email Verification API to validate if an email address is real, active, and safe to use. The SDK performs domain and MX record checks, SMTP validation, and detection of disposable or role-based addresses. It provides a lightweight and reliable cURL-based implementation that returns structured JSON responses. This project is officially maintained by Easy Email Verification Ltd. For technical documentation and API reference, visit https://www.easyemailverification.com

This library helps you easily create a Python application with WhatsApp API. https://green-api.com/en/

The Java SDK for the APT from Yahoo! (http://apt.yahoo.com) API makes it easy to build Search Marketing tools to access and manage APT accounts. Without any pre-knowledge of Axis or SOAP, you can access the APT Web Services as easy as normal Java classes

Nessconnect is a GUI, CLI and API client for Nessus and Nessus compatible servers. With an improved user interface, it provides local session management, scan templates, report generation through XSLT, charts and graphs, and vulnerability trending.

The Java SDK for the Yahoo! EWS API makes it easy to build Search Marketing tools with Java to programmatically access and manage Yahoo! Search Marketing accounts. The client library is a single jar file that contains all that you need to access EWS API.