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“Integrations help lawyers work more smoothly across the tools they already use – with less switching, better continuity and more focus on client work.”

Ruud Helmes, Associate Director Product Management

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How to get the API

Further technical documentation, authentication details, available endpoints and implementation guidance are available on the Wolters Kluwer Connect portal. There, developers can find everything needed to start building secure integrations with Kleos. If you have any questions or need support with your implementation, our team is here to help.
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Frequently asked questions

  • What is an API, and how does it work in legal software?

    An API (Application Programming Interface) is a set of protocols that allows different software applications to communicate and exchange data with each other. It's a secure bridge between systems, sharing information automatically without manual intervention. For law firms, a legal API enables seamless law firm software integration, letting you connect your practice management software with the other tools your team relies on, from CRM platforms to document management systems.

    This removes the friction of disconnected systems. Rather than manually re-entering data across platforms, your tools work together automatically, syncing client records, transferring documents, and triggering workflows without extra admin.

  • What legal data can be accessed or exchanged through the Kleos API?
    The Kleos API provides access to a structured range of legal data, including case files, client and party records, time entries, staff information, and document metadata. Using a legal data API of this kind, firms can retrieve, create, and manage this information programmatically, enabling accurate data flows between Kleos and the other systems in their technology environment.
  • Is the Kleos API secure, and how does it protect sensitive legal data?
    Yes. The Kleos API is built with security controls designed to meet the data protection requirements of legal practice. As a legal API underpinned by Microsoft Azure's infrastructure, it benefits from enterprise-grade security, encrypted data transmission, and reliable access controls, ensuring that sensitive client and case information remains protected throughout any integration.
  • How does the Kleos API support law firm software integration compared to manual processes?
    The Kleos API replaces time-consuming manual processes with automated, reliable data flows between Kleos and the systems your firm depends on. Where manual law firm software integration typically involves re-entering data across platforms, reconciling inconsistencies, or relying on error-prone export-and-import cycles, the API creates direct connections that keep information accurate and up-to-date across your entire technology environment.

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