Hi, @real-ali. Thank you for reaching out! An agent will get back to you shortly. Until then, if any community member has information that may help, please reply to this thread.
On the left of the page you can filter your search by check marking the appropriate checkboxes that fit your use case (refer to screenshots below).
For example, since your use case is on payments, under the Capabilities section you can check the boxes that say Digital Payments, Payment Methods, and Push Payments (first screenshot).
You can filter your search more by check marking the box that indicates what type of client you are (second screenshot).
When you create a project, there will be an Assets section for you to view code in some programming languages.