Add an In-Memory IRequestLogger and service with the default route at /requestlogs which maintains a live log of the most recent requests (and their responses). Supports multiple config options incl. Rolling-size capacity, error and session tracking, hidden request bodies for sensitive services, etc.
The IRequestLogger is a great way to introspect and analyze your service requests in real-time. Here's a screenshot from the http://bootstrapapi.apphb.com website:
It supports multiple queryString filters and switches so you filter out related requests for better analysis and debuggability:
The RequestLogsService is just a simple C# service under-the-hood but is a good example of how a little bit of code can provide a lot of value in ServiceStack's by leveraging its generic, built-in features.