The Embedded API Simulator is a handy tool for unit tests and applications under development that do not fake calls to remote HTTP APIs but actually send HTTP requests and receive HTTP responses over the network.
We made it easy to model API Simulations with an intuitive and simple to use Java DSL (Domain Specific Language). In any case, a contemporary IDE can help, too. Just use its content assist/smart complete/whatever-it-is-called feature to see what a method signature looks like and to get suggestions for auto-complete.
We would love to hear your feedback - send us a quick email to [feedback at APISimulator.com]
Happy API Simulating!