The IBM alphaWorks Web Services Tool Kit for Mobile Devices "provides tools and run-time environments that allow development of applications that use Web Services on small mobile devices. Its Java Web service run-time environment is supported on PoctketPC, Palm, and BlackBerry; the C Web service run-time environment is supported on the Palm." The Java toolkit version uses the kSOAP SOAP API built upon kXML, and implements a subset of the SOAP 1.2 specification. kXML provides "an XML pull parser and writer suitable for all Java platforms including the Java 2 Micro Edition (CLDC/MIDP/CDC); because of its small footprint size, it is especially suited for Applets or Java appications running on mobile devices like Palm Pilots or MIDP enabled cell phones." The C implementation uses gSOAP compiler tools which "provide a unique SOAP/XML-to-C/C++ language binding to ease the development of SOAP/XML Web services and clients in C and/or C++; gSOAP is an application-centric low-memory-overhead toolset suitable for Web service and client executables."

WSTKMD website description:

The Java Web service implementation is based on kSOAP and kXML, which are open-source implementations of Web services made to run on small mobile devices; this implementation supports a subset of the SOAP 1.2 specification. The reasons for supporting only a subset of SOAP 1.2 are the limited amount of memory on these devices and the limited capabilities of the J2ME environment.

The JVMs on mobile devices support development of applications based on the J2ME specification, and IBM's Websphere Studio Device Developer (WSDD) provides an IDE for development of J2ME-based applications. Support for development of applications using Web services has been integrated into WSDD. Using WSDD, a developer will be able to develop, deploy, and debug applications that use Web services on mobile devices.

The C-based Web service implementation is based on gSOAP, which contains a set of C routines for handling SOAP messages, and a stub compiler that automatically maps native and user-defined C to semantically equivalent SOAP data types. With gSOAP, SOAP interoperability is achieved with a simple API; this relieves the developer from the burden of SOAP details and enables the developer to concentrate on the application-essential logic.

Application development using the C-based Web service run-time environment on Palm is supported with Metrowerk's CodeWarrior and the GNU PRC-Tools. CodeWarrior is the premiere C development environment for Palm devices. The GNU PRC-Tools is an open source compiler and development tool for Palm devices.

See also the IBM Web Services Toolkit. The updated August 26, 2002 version 3.2.2 has "Web Services Bus, WS-Tx/BPEL4WS demos, Service Level Agreement (SLA)-based management system, Web Services Matchmaking engine, DIME demo, updated WS-Security features, Web Services Experience Language, and a new SOAP service monitor."