S-money ID uses the OpenID Connect 1.0 protocol, which is an identification layer on the OAuth 2.0 protocol. It allows the third-party application to verify the identity of an S-money user based on the authentication performed by the S-money server and also to obtain basic information about the user.

S-money ID is available in the S-money users area, and also in the dedicated users area.

In the next section of the document, the S-money user indicates the user of the domain which interacts with the third-party application.