The Scratch Pad is a space where you can work while not being connected to Postman Servers. When you aren’t logged in or don’t have a network connection, you can still access some Postman features offline, such as creating collections and requests, or sending requests.
All your work in the Scratch Pad will be stored locally and will not be synced online with Postman. After working in the Scratch Pad, you can later move your work into a workspace once you log in.
Resources :
Docs: https://learning.postman.com/docs/get...
Postman-echo API: https://www.postman.com/postman/works...