What is the acr_values Parameter

The acr_values parameter is used to request a higher level of authentication assurance during the Singpass login flow. However, your Client ID must be whitelisted to use this parameter.

If your Client ID is not whitelisted:

Do not include acr_values in your requests Requests may fail if used without approval

When is acr_values allowed?

Usage is restricted to specific high-risk use cases (e.g. sensitive financial transactions) where higher assurance is required.

All usage must be:

Reviewed and approved by the Singpass team and whitelisted before implementation

Current Status

Onboarding for acr_values is currently paused and is not generally available

We are reviewing the SFV onboarding framework and will reach out to interested parties from Q4 2026 onwards.

Interested in using SFV?

If your use case requires SFV, you may submit your interest: https://go.gov.sg/sfv-interest 

ref: https://docs.developer.singpass.gov.sg/docs/technical-specifications/integration-guide/1.-authorization-request#basic-oidc-parameters