I know very little about Web Services except how to consume them in Visual Studio and push that consumption into a Database table. So if this question does not make sense, please help me correct it.
Basically, I am looking to be able to use a list within my SharePoint 2013 locally hosted site, and create a web-service that can be consumer from outside clients. We have a client who would like to be able to directly connect to our list on our site, and use the data within that list on their site, seamlessly.
On their site, they will have clients looking for data within my list through a proprietary tool they have built. The clients would use one prompt, like 'Member ID' to be able to identify which record they need to look at.
How can this be done. As much step by step information is needed as this is very new to me. Thank you