If you are running a 3rd party application utilising the Web API Interface, you must also upgrade the MicrOpay Client Service to match the hosted version.
Please refer to the attachments below for instructions on upgrading the Service and the current software installer.
Access Group WebAPI v3.8.0.0 update
The Access Group updated Access MicrOpay WebAPI to v3.8.0.0 on Thursday, 11 June 2026. Desktop customers using MicrOpay Client Service (MCS) must download the latest MCS v3.8.0.0 to avoid any connection issues. Please click HERE to download the latest MCS version.
MicrOpay Client Service (MCS)
The Access Group wishes to advise a new version of MicrOpay Client Service (MCS) is now available for download. Please refer to the link below.
See Install or Configure MicrOpay Client Service for more information.
You may disregard this information if you do not use MicrOpay Client Service (MCS) for our ESS product or a 3rd party integration.
Payroll Online and Outsourcing customers do not need to download the MCS, as we update your software to the correct version for your environment.
What is changing?
This release expands the API with new endpoints to retrieve Additions and Deductions, Leave Reasons, Pay Classes, additional Super Funds details, RDO Balances, Tax Scales, Pay Rate History, and Leave Class configuration from MicrOpay, while enhancing existing endpoints to surface additional payroll data including YTD figures and Cost Accounts for EmployeeTransactionSummary. It also includes compliance improvements for NZ Payday Filing, address field constraints aligned to MicrOpay database limits, and improved diagnostic logging for faster incident resolution.
For more details on what's included, see API change log.