| Interface | Description | 
|---|---|
| FnService | An interface sharing common behavior with services used during execution of user Fns. | 
| HeaderAccessor | Interface to access headers in the client request. | 
| ServerFactory.UrlFactory | Factory that constructs client-accessible URLs from a local server address and port. | 
| Class | Description | 
|---|---|
| GrpcContextHeaderAccessorProvider | A HeaderAccessorProvider which intercept the header in a GRPC request and expose the relevant
 fields. | 
| GrpcFnServer<ServiceT extends FnService> | A  gRPC Serverwhich manages a singleFnService. | 
| InProcessServerFactory | |
| ServerFactory | A  gRPC serverfactory. | 
| ServerFactory.InetSocketAddressServerFactory | Creates a  gRPC Serverusing the default server factory. |