Where can I find PayPal code samples?

PayPal provides a selection of code samples and templates for you to use to accelerate your development.  

You can use the samples provided within PayPal Developer to select, preview, and implement one or more samples into your development projects. You can also browse additional source code examples through GitHub.

The PayPal Developer site includes code snippets illustrating a particular feature of the API. For example, see the articles for Invoicing API, Payments API, Payouts API just to name a few, along with many other code samples and examples provided within PayPal Developer.

The following SDKs are also available:

PayPal Mobile SDKs
REST Server SDKs
PayPal Here SDKs
Additional SDKs topics