PayPal Developer Central includes an environment called the PayPal
Sandbox, in which you can test your PayPal Web Services applications,
as well as IPN and PDT features (discussed in Chapter 7 of the book). The Sandbox looks and behaves like the
PayPal web site, with one important exception: no real money is
transacted. You can create and access multiple test accounts in the
Sandbox, which means that you can create both a business and a buyer
account without the hassle of setting up real email, credit card, and
Before PayPal created its Sandbox, you would have had to create two
real PayPal accounts and use real money to test your code. There was
no way to get around that, but you could send test payments in
pennies--$0.01 for a widget or $0.02 for a gumball--and
then refund the transactions immediately thereafter. As you can
imagine, this process quickly became burdensome. Although some
companies (such as Eliteweaver) offered good IPN-testing solutions,
ultimately nothing was able to replace the comfort of knowing that
your code worked against the real thing.
Creating a Sandbox Account
Creating a Sandbox PayPal account is similar to
creating a live PayPal account. The web pages look and behave almost
identically. Here's how to do it:
Log in to Developer Central with your new developer account and click on
the Sandbox tab.
Click on the Create Account link, at which point a familiar page
appears: the PayPal sign-up page.
It might be a little jarring to see the PayPal account sign-up page,
but if you look at the top left corner, you'll see a
PayPal Sandbox logo, verifying that you did swallow the blue pill and
are indeed working within a simulated PayPal environment.
To create a business account, select the Business Account option. Select your country
and click on the Continue button.
On the next page, enter any existing address and phone number. This
information never leaves the Sandbox, so the information you enter
here makes little difference. Click on the Continue button when
On the Enter Your Information page, type an email address and
password. To make it easy on yourself, use a simple email address
such as firstname.lastname@example.org and an
easy-to-remember password such as qwertyui. You
don't have to use a real email account, because the
Sandbox emails never leave the Sandbox.
Real currency isn't involved when using the Sandbox, so there
isn't much of a security issue. You might choose to
use the same password for every Sandbox account you create. Having to
manage multiple passwords is pointless and can slow down your
You also need to provide answers to two security questions. Again,
this information never leaves the Sandbox. Enter something obvious,
such as your own last name, for Mother's Maiden Name
and the town you work in for City of Birth. Finally, enter the
Security Measure characters and click on the Sign-Up button.
Next, you will be asked to confirm your email address. Before you
do, repeat steps 1 through 6 to create a second Sandbox account, from
which you can send test payments. To create a buyer account, select
Personal Account (instead of Business
Account) in Step 3. You'll be asked fewer questions
You might want to create both types of personal accounts (Standard
and Premier) to mimic the different types of PayPal users who will be
buying things from your site. To create a Premier account, answer Yes
when asked "Would you like this to be a Premier
Figure 8-2. Buyer and Seller accounts in the Sandbox
Confirming Your Sandbox Email Addresses
Just as you would on the live PayPal
site, you must confirm your newly created PayPal Sandbox accounts
before you use them. Normally, PayPal sends a real email message to a
newly added email address for confirmation, but email sent on behalf
of pseudo accounts would be confusing, to the say the least. So, for
security and other reasons, PayPal's Developer
Central web site includes a self-contained pseudo email messaging
system to catch and display emails the PayPal Sandbox generates.
To view these emails, log in to the Developer Central web site and
click on the Email tab. A list of emails from PayPal to your various
accounts will be displayed here. Click on the subject link of any email
to open the email message, as shown in Figure 8-3.
Figure 8-3. The PayPal Sandbox account verification process
To confirm your Sandbox account:
Copy the URL from the Activate Your PayPal Account email.
Open a new browser window, paste the URL into your
browser's address bar, and press Enter.
Enter the password for your account and click on Submit.
You will need to follow this process for every new Sandbox account
Verifying Bank Accounts in the Sandbox
PayPal uses bank accounts to verify [Hack #2]
that their members are who they say they are.
Bank accounts are also used to add and withdraw funds [Hack #20].
Adding a bank account to a Sandbox account is relatively
straightforward and has the added bonus of instantly making you
rich--at least in the world of the PayPal Sandbox.
To add a bank account to your PayPal Sandbox account:
Log in to the Sandbox with your business account, and click on Add Bank
Account on the My Account/Overview page.
The Add Bank Account page will be conveniently prepopulated with a
fake bank account number. Add a name for the account and click on Add
Account. Be sure to make note of the account numbers used for the
bank account, because you will need them in the future to add
multiple users or enable other features.
At the time of this writing, the Sandbox displays this account number
only once: at the moment of its creation. So, write it down
somewhere, because you won't see it again. One way
to remind yourself of this bank account information is to use the
routing number and bank account as part of the account name (for example,
BofA-325272157_10448249836185934481). If you do
forget the account numbers, you might want to abandon this Sandbox
account and open another.
On the Get Verified page, click on Add and Confirm a
Checking Account to be taken to the Confirm Bank
Account page. Select the bank account you would like to confirm and
click on Submit. Click on Continue when you see Your U.S.
Bank Account Has Been Confirmed.
Repeat this process for your buyer account.
Adding Funds (and Getting Rich Quick)
When you've verified all your accounts, the last
step is to put some
money in your
Personal (buyer) account.
You don't have to add funds to your account before making a payment,
because PayPal will let you fund payments from your fake bank account
or fake credit card, just as in real life.
To add funds, log in to the Sandbox with your Sandbox buyer account,
and from the My Account tab, click on Add Funds. Click on the Transfer
Funds from a Bank Account link and follow the instructions. You need
to put some money into your Personal account only, since
that's the account from which
you'll be making your pseudo payments.
The transaction will be held as Pending until you actually view the
details of the transaction and click on Clear Transaction or Fail
Transaction. For the purposes of this hack, select Clear Transaction
This might be the most fun of all the things mentioned in this book,
because you can, on a whim, transfer any amount of money into your
account and become a pseudo millionaire in seconds! (And you thought
this was going to be about the coding!)
--Rob Conery and Dave Nielsen
Shannon Sofield began working with Macromedia development tools when Macromedia acquired Future Splash.
Dave Nielsen is the co-founder of CloudCamp, and principal consultant at Platform D, a developer programs consulting company. He is also coauthor of PayPal Hacks.
Dave Burchell got his start with computers by programming the Radio Shack TRS-80 in BASIC and the Commodore 64 in 6510 assembly. A fervent proponent of XML, Dave enjoys solving content-management problems with markup and open source software.