generated: '2026-07-23'
method: searched
source: https://developer.lloydsbanking.com/prod01/lbg/lbg-support/sandbox-guide
docs: https://developer.lloydsbanking.com/prod01/lbg/get-started
note: >-
  Halifax Read/Write APIs are testable through the shared Lloyds Banking Group
  Sandbox, which replicates production functionality for authorised (and
  onboarding) Third Party Providers. Open Data APIs are public production
  endpoints with no separate sandbox. No published magic test values were
  captured verbatim (the Sandbox is credential-gated per the OB Directory); do
  not fabricate test PSUs, accounts, or card numbers.
environments:
  - name: sandbox
    purpose: >-
      Develop and test AIS/PIS/CBPII integrations against Sandbox versions of
      the Read/Write APIs without impacting live environments.
    access: >-
      Free with registration in the Open Banking Directory; grants read/write
      access to the Sandbox Read/Write APIs.
    guide: https://developer.lloydsbanking.com/prod01/lbg/lbg-support/sandbox-guide
    replicates_production: true
  - name: production
    purpose: Live AIS/PIS/CBPII once TPP is fully onboarded and certified.
    access: Requires OB Directory onboarding + OBIE/eIDAS certificates + Lloyds portal enrolment.
test_data:
  published_magic_values: false
  detail: >-
    Sandbox test PSUs, accounts and payment scenarios are provisioned inside the
    credential-gated Sandbox rather than published as static magic values;
    consult the Sandbox Guide after registering.
open_data_testing:
  detail: >-
    Open Data endpoints (e.g. https://api.halifax.co.uk/open-banking/v2.2/atms)
    are live, public and unauthenticated — callable directly for testing.