API release news 04/26

ARPIL 2026

“Get search”: The search for addresses using telephone numbers has been improved

Get Search

The search for addresses using telephone numbers has been improved. Different ways of writing telephone numbers (e.g. with spaces, hyphens or different country code variations) are now automatically recognised. Thanks to ElasticSearch running in the background, matching addresses are now found even faster.

API release news 03/26

MARCH 2026

1.) Breaking Change: Update to “Get Search criteria fields” endpoint.

Get Search criteria fields

We resolved an inconsistency regarding how possible options are returned for select fields. Previously, multiselect fields returned all options (both active and inactive), while single-select fields returned only active ones.

Update: Multiselect fields now behave the same as single-select fields and will only return active options. Inactive options are no longer included in the response payload.

2.) Link Email Attachments to Appointments

Create Appointments

A new optional parameter, mailMessageId, has been added to the calendar creation action. This feature allows attachments from a specified email to be automatically linked and saved to the ‘Files’ tab of the newly created appointment in the onOffice App, mirroring the functionality available in onOffice enterprise.

API release news 12/25

DECEMBER 2025

1.) New API call “Agents log / Activities”

Modify Agents log / Activities

2.) Retrieve Immofeedback status (Status der Nachbereitung)

New request parameter “showFollowUpStatus” and new value “followUpStatus” in response parameter “contacts”.

Get Appointments

3.) Set Immofeedback status (Status der Nachbereitung) via “Modify relations”

Request parameter “relationinfo” has been extended to include the value “statusTerminrueckmeldung”.

Modify Relations

4.) New API call for appointment conflicts

Get Appointment conflicts