Hello @Dwhapham
You’ve not provided any information about which product’s API endpoint you are attempting to access, the format of the API request, the authentication method, what documentation you’re referencing, what tests you’ve done outside your C# code using an API test tool or what debugging efforts you’ve made yourself. Without this, it’s not possible to provide much assistance.
Refer to the How to ask a good question thread for guidance on the minimum information you’ll need to supply.