Its sometimes required that you need to have some url returning some data to finish your client server software. But you may not have the luxury of server side thing completed as it may involve some complexities.

Lets say that I have a json file like this

[
  {
    "name": "Karthik",
    "age": 28
  },
  {
    "name": "Murugan",
    "age": 32
  }
]

All I need to do is to create a folder. Create a file say called people.json with the data above in it. In my terminal goto that location and type python -m http.server, launch my browser and type http://localhost:8000/people.json and I will be having that data to stub and complete my work.

See my result here: