How To POST JSON data with Curl Command Line

Question- How to POST JSON data with curl? How to POST JSON data with curl command line? How do I POST JSON data on Linux terminal?

You can add -H "Content-Type: application/json" header value to Post the JSON data to curl command line.

For example, I have an API URL http://api.example.com/v2/login, that is used to authenticate the application. Now passing the username and password in JSON format using curl command line.

$ curl -H "Content-Type: application/json" -X POST -d '{"username":"abc","password":"abc"}' http://api.example.com/v2/login

You can also write username and password in user.json file. Now use this file to pass the JSON data to curl command line.

$ curl -H "Content-Type: application/json" -X POST -d @user.json http://api.example.com/v2/login