curl --request POST \
  --url https://api.example.com/api/v1/oauth/introspect \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data 'token=<string>'

{
  "active": true,
  "client_id": "<string>",
  "exp": 123,
  "iat": 123,
  "scope": "<string>",
  "sub": "<string>",
  "token_type": "<string>"
}