You can set global responses, or you can pass in individual endpoints where those responses apply, and proxy all other endpoint requests to the original service. This gives you the ability to test your system against the other service and simulate an error on a single endpoint while the rest of the service works normally.From the source or compiled binary, just set the response you want. Note that you can pass in multiple headers to be returned by using -header repeatedly. You can also limit which methods the hyjacking will affect with multiple -method parameters. You can also choose to match against a pattern string if you additionally pass in the -pattern_match flag.