{
“errors”: [
{
“msg”: “Invalid SDK credentials”,
“code”: 4002
}
]
}
For the request from postman for chat history API scope.
Hello @ramyakumar23rpg 
,
Welcome to Kore Community 
Thank you for stopping by!!
For any API to work, two things should be correct - JWT token and scopes defined for the relevant App.
Ensure that right scopes have been enabled to the App used for JWT generation.
For correct process of jwt token generation check out our post:
Hope this helps!! Let us know if there are any further questions.