Introspect endpoint returning bad request

I m calling introspect endpoint in postman , putting token_type and token in query params and in headers , i’m giving content-type as application/xx-www-urlencoded , authentication as basic (base64{clientid:client_secret}) but still receiving bad request. Please help.

What request URL are you using?

If your request URL is correct, you may want to try using our OpenID Connect Postman Collection to help you format this request

The url is correct. What should i import from the collections?

The OpenID Connect collection will have a pre-configured request for the Introspect endpoint