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Name-Value Pair (NVP) API

Technical Details

56 March 2008 PayPal Certified Developer Program Study Guide

Request Format

Each NVP request consists of required and optional parameters and their values. Parameter

names are not case-sensitive. As shown in Table 5.2, this document uses UPPERCASE for

parameter names and divides the parameters into required security parameters and body

parameters.

In practice, concatenate all parameter names and URL-encoded values in a single string. After

the METHOD parameter, the parameters can be specified in any order.

Required Security Parameters

The required security parameters are the same as the developer’s PayPal API credentials,

which are described in “API Credentials” on page 47.

API Parameters

The request body must contain the name of the API method in the METHOD parameter. In

addition, each method has required and optional parameters:

METHOD=methodName&requiredAndOptionalParameters

All API methods and their parameters are detailed in PayPal Name-Value Pair API Developer

Guide and Reference.

TABLE 5.2 General Format of a Request

Required security

parameters

USER=apiUsername&PWD=apiPassword&SIGNATURE=apiSignature&

SUBJECT=optionalThirdPartyEmailAddress&VERSION=3.3

The following parameters are always required:

z USER

z PWD

z VERSION=3.3

z SIGNATURE

N OTE: In the examples in this and other PayPal documents, the required security parameters

sometimes appear like this:

[requiredSecurityParameters]

Body parameters &METHOD=methodName&otherRequiredAndOptionalParameters

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PayPal Certified Developer Program - 2008 Guide d'installation Page 56