Singpass Authentication API

The purpose of this guide is to describe the necessary APIs that Relying Parties (RPs) must invoke to facilitate an Open ID Connect (OIDC) authentication for a Singpass user via the Redirect Authentication Flow.

RPs are to implement the following steps:

Frontend:

• Step 1a: Redirect to Authorization endpoint.

Backend:

• Step 4: Exchange auth code with ID token (involves client authentication) using Token endpoint.