import { Client } from "@notionhq/client"

const notion = new Client()

const response = await notion.oauth.introspect({
  client_id: process.env.OAUTH_CLIENT_ID,
  client_secret: process.env.OAUTH_CLIENT_SECRET,
  token: "access_token_to_introspect"
})

{
  "active": true,
  "scope": "<string>",
  "iat": 123,
  "request_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}