Need help building an API connection

I need to create a simple search for a part number and display it on a webpage. This will be via an API/XML feed. Can someone point me in the right direction on setting this up?

Is it an API or XML feed? Typically for API’s the place to start is the API documentation, as it will provide info on how to format requests.

Though, to be frank, it’s not readily clear what you’re asking for. Maybe a bit more detail would help?