Technical documentation

Our technical documentation will help you:

  • understand how GOV.UK Sign In works
  • integrate with GOV.UK Sign In’s test environment for authentication

The documentation covers both the authentication and identity checking parts of GOV.UK Sign In.

Only the authentication part is available to all central government services now.

We’ve included information about identity checks because this feature is being tested by selected services. It will also let all services see how our identity checks work.

Read our technical documentation (opens in new tab)