I have an API I need to consume; however, they don't have Swagger and the setup in the cloud seems to like Swagger.
If the vendor doesn't have a swagger doc of their API, you can create one and add it to the endpoint documentation on the API definition. You will need refresh the API metadata after it's added in order for it to be selectable in API Flows, etc. You can use use the swagger editor to build the swagger file.
https://editor.swagger.io/