POST /introspect

const response = await fetch('https://api.auth-agent.com/introspect', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    token: accessToken,
    client_id: process.env.AUTH_AGENT_CLIENT_ID,
    client_secret: process.env.AUTH_AGENT_CLIENT_SECRET,
  }),
});

const result = await response.json();

if (result.active) {
  console.log('Token is valid');
  console.log('Agent ID:', result.sub);
  console.log('Expires at:', new Date(result.exp * 1000));
} else {
  console.log('Token is invalid or expired');
}