Starting from v2024-04-01, we deprecated API Token auth in favor of system access authentication. In addition to making system access more secure, this improvement lets you manage multiple applications per organization and properly perform system-level operations such as creating partner managed companies, subscribing to webhook.
Payrolls API Updates: modified fixed compensations behavior for unprocessed payrolls. These changes were made primarily to improve performance of the payroll API endpoints and you should experience faster Prepare a payroll and Update a payroll responses.