The PayPal Core SDK addresses the essential needs of the PayPal API caller: Frequent and up-to-date releases: The PayPal Core SDK is available on NuGet, which translates as immediate SDK refreshes upon updates to PayPal APIs. Simpler configuration: A single configuration file that lets you manage your API credentials (supports multiple credentials)... More information

The PayPal Merchant SDK provides the following: SetExpressCheckout API Operation (NVP/SOAP): The SetExpressCheckout API operation initiates an Express Checkout transaction. DoDirectPayment API Operation (NVP/SOAP): The DoDirectPayment API Operation enables you to process a credit card payment. MassPay API Operation (NVP/SOAP): The MassPay API opera... More information

The PayPal helper allows you to integrate PayPal payments within your WebMatrix website or e-commerce application. With a few lines of code you'll enable your Website customers to click on a payment buttons to pay for their purchases with their PayPal accounts.

The PayPal Adaptive Payments SDK provides the following methods: Payments: Pay: Transfers funds from a sender's PayPal account to one or more receivers' PayPal accounts (up to 6 receivers) PaymentDetails: Obtains information about a payment created with the Pay API operation ExecutePayment: Executes a payment GetPaymentOptions: Obtain the settings ... More information

The PayPal Button Manager SDK provides the following methods: BMButtonSearch API Operation (NVP/SOAP): Use the BMButtonSearch API operation to obtain a list of your hosted Website Payments Standard buttons. BMCreateButton API Operation (NVP/SOAP): Use the BMCreateButton API operation to create a Website Payments Standard button. BMGetButtonDetails ... More information

The PayPal API uses HTTP verbs and a RESTful endpoint structure. OAuth2.0 is used as the API Authorization framework. Request and response payloads are formatted as JSON.

The PayPal Adaptive Accounts SDK provides the following methods: CreateAccount: Creates PayPal accounts. AddBankAccount: Link bank accounts to PayPal accounts as funding sources. AddPaymentCard: Link payment cards to PayPal accounts as funding sources SetFundingSourceConfirmed: Set the funding source to confirmed; they may set the account to PayPal... More information

The PayPal Permissions SDK provides the following: GetPermissions API Operation: Use the GetPermissons API operation to obtain the permissions associated with an access token. RequestPermissions API Operation: Use the RequestPermissions API operation to request permissions to execute API operations on a PayPal account holder’s behalf. CancelPermiss... More information

The PayPal Invoice SDK provides the following: CreateInvoice API Operation: Use the CreateInvoice API operation to create a new invoice. The call includes merchant, payer, and API caller information, in addition to invoice detail. The response to the call contains an invoice ID and URL. CancelInvoice API Operation: Use the CancelInvoice API operat... More information

Provides a C# wrapper around sending and recieving Paypal transactions. Also provides a way to create dynamic Paypal buttons

Easy payment processing for .NET (DataCash, PayPal)

Provides a C# wrapper around sending and recieving Paypal transactions. Also provides a way to create dynamic Paypal buttons

Simple PayPal clients for working with PayPal invoice API.

Contains numerous utilities, helper classes, custom web controls, form controls, loggers, wrappers(Paypal,Blogger,Picasa,Twitter, ect.), Barcode readers, Security modules and more. Individual libraries are available as well.