Express Checkout returns 400 when sending multiple transactions

[Settenop]

I've been using the express checkout for a while without problems, I've implemented it following the instructions provided here https://developer.paypal.com/docs/integration/direct/express-checkout/integration-jsv4/server-side-R... .

Now I need to send money to multiple payee in one payment, and so, for each payee involved: I've created a new transaction and added the payee items and the corresponding payee object to the transaction, then the new transaction is added to the transactions array.

->transaction: https://developer.paypal.com/docs/api/payments/#definition-transaction
->payee: https://developer.paypal.com/docs/api/payments/#definition-payee

When I attempt to create the payment with the transactions array, created as explained before, i get an error 400: "only single payment transaction currently supported".
->create_payment: https://developer.paypal.com/docs/api/payments/#payment_create

How can I send the payment to multiple payee at once? Am I doing something wrong?

I'm from Italy and the environment is a c# WebApp without SDKs.

Thanks in advance to anyone who will answer.

[MTS_Jennifer · Accepted solution]

To send payments to multiple payee's at once, you will need to be setup with PayPal For Marketplaces.

Here is the information on PayPal For Marketplaces:

https://developer.paypal.com/docs/marketplaces/pp4mp/

From the PayPal Developer site:

Our PayPal for Marketplaces solution has two integration paths to choose from based on how you run your business:

• Connected path. A marketplace model in which each individual PayPal merchant assumes financial liability, rather than you, the partner. All merchants must have PayPal Business accounts.

• Managed path. A marketplace model in which the partner assumes financial liability. Merchants aren't required to have PayPal Business accounts.

Thank you,

Jennifer

[Settenop]

I hope the documentation becomes as good as the support.

Maybe this should be pointed out in a note on the payee object reference.

Thank you for your time