Through the ZEP Interfaces, ZEP exposes a REST and a SOAP API for integration with external systems. This allows master data, time bookings, projects, and additional content to be exchanged with ZEP programmatically.
Product line availability
Note: The ZEP Interfaces are available in ZEP Clock, ZEP Compact, and ZEP Professional.
The module is added as an optional module via the ZEP Self-Service Tool under Administration > Account.
Prerequisites
The following prerequisites are required to set up the ZEP Interfaces:
Licensed ZEP Interfaces module
Administrator rights in ZEP
Technical resources on the customer side: a developer or integration partner who connects the API
SOAP interface
The SOAP interface is ZEP's established web service interface and can be accessed via an XML-based request-response structure. It is often used for server-side integrations with existing backend systems.
Configuration is performed under Administration > Interfaces > SOAP interface. The following details are available there:
WSDL location – endpoint address for embedding the interface in the client
Authentication method – selectable between Digest, Basic, and Token
Login and secret – depending on the chosen authentication method
IP authentication – optional restriction to specific client IP addresses
Send employee access data automatically – controls whether new users automatically receive an email with access data
REST interface
The REST interface is the modern API based on HTTP/JSON. It is particularly suited for web and mobile applications as well as for connecting cloud services and is described in a machine-readable form via an OpenAPI specification.
Configuration is performed under Administration > Interfaces > REST interface. The following details are available there:
Base URL – endpoint address for all REST calls
Bearer token – token for authenticating each request
Typical use cases
The ZEP Interfaces can be used for a wide range of integration scenarios. Common use cases include:
Reporting and business intelligence – transferring project, time, and revenue data to external BI tools (e.g., Power BI, Tableau, Google Looker Studio)
HR system synchronization – automatic transfer of employee data from the leading HR system into ZEP
CRM integration – transfer of customer and project data from the CRM (e.g., Salesforce, HubSpot) into ZEP
Custom applications – building your own apps for time tracking, project overview, or approval workflows
Workflow automation – automatic creation or modification of bookings, projects, or absences triggered by external events
Documentation in Developer Hub
The complete endpoint reference, OpenAPI specification, technical examples, and an FAQ section on integration are available in the ZEP Developer Hub:
The Developer Hub is intended for developers and integration partners and is the authoritative technical reference for connecting to the ZEP Interfaces. A link to the Developer Hub is also available directly on the SOAP and REST interface settings pages in ZEP.