See the API's various operations for details on their request parameters and response data:

OperationMethodEndpoint
Get an access tokenPOST/access/​getAccessToken
Get an authorization codePOST/access/​getAuthorizationCode
Get a verification codePOST/access/​getVerificationCode
Set a timestampPOST/access/​use_verification_code
Complete social loginPOST/oauth/​auth_native
Complete traditional loginPOST/oauth/​auth_native_traditional
Send a reset password linkPOST/oauth/​forgot_password_native
Link a social identity to a user accountPOST/oauth/​link_account_native
Complete social registrationPOST/oauth/​register_native
Complete traditional registrationPOST/oauth/​register_native_traditional