Getting started -- Getting started with the eBay webservice
Developing eBay applications
The eBay webservice is of course not free to use by the public. To develop and
test your applications, you will have to register as an eBay developer (which is
free of charge). Furthermore, you will not be able to test and develop on the
eBay site, before your application has been certified.
The eBay sandbox
The eBay Developers Program Sandbox is a test environment that represents a "mini" eBay site.
The Sandbox provides the most important features of the eBay site, allowing you to build and
test your application in a non-production environment. The eBay Sandbox supports both API testing
as well as site testing via the GUI interface.
While developing your application, you will always be using the eBay sandbox, which can be accessed
via web at http://sandbox.ebay.com/. This site looks and behaves
like any eBay website you are being used to.
Using the sandbox
To develop applications in the sandbox you will have to register at the
eBay developers program. To do this, follow these steps:
Register as an eBay user:
In order to register as an eBay developer, you'll have to be an
eBay user. As eBay users are valid on all international sites, it is
sufficient if you have an eBay user id for your local eBay site, like ebay.com or
ebay.de.
Register as an eBay developer:
Next, you will have to register as an eBay developer at the
eBay developer program. This procedure
can take some time, as they require you to enter a lot of information, so you should do
this carefully. If you are developing an open source application using Services_Ebay, you should
apply for an Individual license.
After the registration has been finisehd, you will recieve three keys that you will need
to authenticate your eBay application: DevID, AppID and CertID. You will need these keys later
so you should save them somewhere.
Create one or more test users:
As the sandbox does not share any data with the eBay sites, you will have to create new users
that you can use to add items, make transactions and give feedback. You can create as many users
as you need for testing purposes, just use the registration form
in the sandbox.
You will need a valid email address for each of your users, as well as a valid US address and telephone
number, you can easily get on by using YellowPages. A credit card is
not required, your test users will receive money from eBay they can spend in the sandbox. Of course, this is
no real money, which has not use outside of the sandbox.
Validate your test users:
If you want your test users to sell items on eBay, you will need to validate them. This can be done using
the ValidateTestUserRegistration() API call, which is already supported by Services_Ebay.
Authentication and Authorization
eBay's Auth&Auth process is quite complex and can be the biggest hurdle for getting started with
the webservice. To make an API call the following information is required:
DevID (received after registration, unique per developer)
AppID (received after registration, unique per application)
CertID (received after registration, unique per application)
Authentication Token, unique for each user of your application
While you already are in possession of the first three tokens, you still need the last one
to make an API call. If your application is used by more than one user (which is the case
for web applications), eBay does not want your application to receive the usernames and passwords
of your users. If a user authenticates, your application is supposed to redirect him to the
eBay login page and pass an additional parameter (a so called RuName). The user will then enter
his login information as he is used to on the eBay website and then authorize your application
to make API calls on his behalf.
After that, eBay will redirect the user back to your application and pass a unique token, which can
be used to identify this user when your application is making API calls. This technique has several
advantages:
Single sign-on system for eBay applications
When your application is hacked, no passwords are revealed
The user only sees the login screen he is used to.
As this authentication procedure is quite complex and requires various API calls to function
there is an easier way, which can be used for testing. eBay provides the so called
Single-User-Tool, an HTML-based
tool, which creates tokens that you can use to authenticate a user. All you need to do is
submit your DevID, AppID and CertID and select whether the token will be used in the
sandbox or production environment.
Getting started with Services_Ebay
Services_Ebay provides a lot of examples, which demonstrate how the API calls have to be
used. After installing Services_Ebay, they will be located in the docs/ directory of your
PEAR installation. In order to run the examples, you will have to supply the authentication
credentials you received from eBay. The easiest way to do this, is to modify the config.php
file, which is located in the examples folder.
// DevID, AppID and CertID
$devId = 'HFGHSK7JKKJ82JKJFJHF84LKH86Z3JFF71KJKH';
$appId = 'IUENVCLJEGBN62JLKKLJHD34KKJL-GDJHDGJHD';
$certId = 'GHKL67JKDJLKJGFBNMBCHGDLÖWJH241KKHJKKJ';
// Username and password, only required by some calls
// that set up the Auth&Auth mechanism
$username = 'YourTestUser';
$password = 'Secret Pass';
// Token as returned from the Single-User-Tool
$token = 'AgAAAA.......3jfiEQ**';
