Keycloak Token introspection

#!/bin/bash

KC_REALM=<insert realm name here>
KC_USERNAME=<username here>
KC_PASSWORD=<password here>
KC_CLIENT=<client name here>
KC_CLIENT_SECRET=<client secret here>
KC_SERVER=<server address and port here>
KC_CONTEXT=auth

# Request Tokens for credentials
KC_RESPONSE=$( \
   curl -k -v -X POST \
        -H "Content-Type: application/x-www-form-urlencoded" \
        -d "username=$KC_USERNAME" \
        -d "password=$KC_PASSWORD" \
        -d 'grant_type=password' \
        -d "client_id=$KC_CLIENT" \
        -d "client_secret=$KC_CLIENT_SECRET" \
        http://$KC_SERVER/$KC_CONTEXT/realms/$KC_REALM/protocol/openid-connect/token \
        |jq .
)


echo Response=$KC_RESPONSE

KC_ACCESS_TOKEN=$(echo $KC_RESPONSE| jq -r .access_token)
KC_ID_TOKEN=$(echo $KC_RESPONSE| jq -r .id_token)
KC_REFRESH_TOKEN=$(echo $KC_RESPONSE| jq -r .refresh_token)

# Show all keycloak env variables
#set | grep KC_*

# Introspect Keycloak Request Token
curl -k -v \
     -X POST \
     -u "$KC_CLIENT:$KC_CLIENT_SECRET" \
     -d "token=$KC_ACCESS_TOKEN" \
   "http://$KC_SERVER/$KC_CONTEXT/realms/$KC_REALM/protocol/openid-connect/token/introspect" \
   | jq .

Does introspect work on public clients? Is there any way to verify access token for public clients?