
Web Services API Reference July 2006 13
Preface
This Document
This document, PayPal Web Services API Reference, which describes the PayPal Web
Services Application Programming Interface (API) and service, replaces the edition issued
March, 2006.
Intended Audience
This document is written for programmers familiar with Web Services application
programming standards such as the Simple Object Access Protocol (SOAP), the Web Services
Description Language (WSDL), and XML Schema Definition (XSD) language.
Organization of This Document
Chapter 1, “Overview of the PayPal Web Services API,” presents high-level information about
the purposes of the API, supported development environments, and usage limits and fees.
Chapter 2, “PayPal Web Services API Architecture,” describes the architecture of the API
services, its security features, the PayPal SOAP and WSDL implementations, and data
characteristics, such as character encodings, currency and date/time formats, and other
information.
The central chapters describe individual PayPal Web Services APIs for a variety of business
functions.
Appendix A, “Error Codes and Messages for All PayPal APIs,” details specific errors and
warnings for each individual PayPal Web Services API.
Notational Conventions
This document uses typefaces to identify the characteristics of text. These typefaces and the
characteristics they imply are described below:
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