SuperTokens is an open source authentication solution offering features like: Different types of login: Email / password, Passwordless (OTP or Magic link based).

SuperTokens.com

For a long-running nextJs page that polls the backend periodically, any suggestions as to how I should refresh the session so the APIs calls don't start failing?

Refreshing of session should happen on its own in case the api retune a 401. Is that not happening?

I'm using an apollo-client on Next.JS application. It does not appear to be intercepted  and refresh not called.

What’s the apiDomain that you set on the frontend? And what domain is the Apollo client querying?

export const appInfo = {
  appName: 'example',
  websiteDomain: 'https://localhost.ansont.dev',
  apiDomain: 'https://localhost.ansont.dev',
  apiBasePath: '/api',
}