Mocking a Web Service with NetCat

Write the web service's response(xml, json, plain text) in a file, and then run the following in a terminal:

$ while true; do echo -e "HTTP/1.1 200 OK\r\n\r\n$(cat wsresponse.file)" | nc -l 9999; done

Where wsresponse.file is the file with the web service response.

In this case, the web service mock is listening in the port 9999. Just change the port as your needs.