curl how to send json data code example

Example 1: curl post json

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

Example 2: curl pass data in request

curl -d "param1=value1¶m2=value2" -X POST http://localhost:3000/data