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Domino REST API (previously known as HCL Project KEEP) has been released and up-to-date information is available at

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HCL Project KEEP

HCL Project KEEP, a.k.a Domino REST API, provides a secure REST API access into HCL Domino servers and databases.

1.7.x Beta EA

KEEP objectives

Make Domino development and access available to a broad audience with diverse development backgrounds. Keep the barrier to entry low without sacrificing enterprise and container deployability. Ensure access control through declaration on the server and its databases, relieving end-user applications from that task!”

KEEP 1.7.x Beta EA Changelog

KEEP is under active development, based on your input and insight. From version to version (until GA) we might break things, so be sure to check the Changelog and bear with us on the quest to get it right!


Get started now View it on GitHub Download 1.7.x Beta EA


Log in to Flexnet before downloading KEEP using the above button.

To troubleshoot error “The account ID or package ID is missing. Please provide it and try again.”, search for “HCL Domino REST API Early Access” in the product list.

We want to hear from you

Join us for questions, discussions, ideas and feedback over at OpenNTF’s Discord server and/or participate in the Early release forum.

Where is the actual API documentation?

We use an OpenAPI based API specification. Its documentation can be seen after starting KEEP and opening its URL (depending on your Domino server URL). This way you can be sure to always look at the specification running on your server, current and accurate

Domino REST API is designed to re-establish Domino as a world class, modern, standards-compliant, cloud native and enterprise-level collaboration platform. It adds contemporary REST APIs to Notes and Domino, enabling a modern programming experience with the tools of your choice.

Classic Domino applications are document-oriented and often based on an approval model: documents flow through a business lifecyle and are approved at each stage. Domino developers develop a separate user interface for each approval state that is used by the people who perform the actions for that state.

KEEP moves access control out of the code and into the configuration. But it means control stays with those who need to support the data, not those who consume the data. KEEP grants granular access for actions like read or write depending on what the document data is and who is viewing it. This approach ensures that the correct person can perform the correct action on the document and its data. Most importantly, it means control over data quality remains with those who need to support the data, not those who provide and consume the data.


For example, in the case of an expense report filed by an employee, the approver and the employee can only edit the fields that correspond to their role. An approver might be able to approve and add a remark only and an employee might be able to provide a subject, description, and cost only.

This granular access managed through configurations is what makes Domino REST API unique!

Also, in KEEP, we built modern REST APIs that are designed to bring Notes and Domino forward in the current market. KEEP adds OpenAPI specified REST APIs to Domino and allows the latter to talk to any server or client over http, https or http/2. Using KEEP APIs, any application that talks https can access the data from a Domino database, hence extending the availability of this data beyond the Notes client.

Basic KEEP Diagram

For example, the data in a Domino database that could earlier be viewed only in a Notes client, can now be viewed on mobile applications as well using the KEEP APIs. Refer to the use cases for more examples.

The KEEP APIs are secure and standards-compliant, making them the right choice for your Notes and Domino ecosystem.

Much like the architectural keep that fortifies the castle, Project KEEP adds to the existing functionalities provided by Notes and Domino.

KEEP can run on your developer desktop, where you can evaluate it from your Notes client. KEEP is available on Windows (client & server), Linux (server), Docker (server) and macOS (client) as add-on for Notes and Domino 12.0.1 and later.

KEEP caters to Domino mail as well as Domino applications, irrespective of the difference in the way they work. While Domino mail allows one-to-one mapping between users and mail files (with only occasional exceptions), Domino applications allow multiple users to access the same application. KEEP looks beyond this difference and serves both Domino mail as well as Domino applications.


What applications does KEEP support?

KEEP is designed to work with:

Project KEEP features

KEEP is based on industry standards, allows Notes and Domino to be accessed from other platforms, follows standard APIs, is extendable and uses the Notes and Domino security model. KEEP also puts the power in the hands of the developer to work using their preferred programming language.

KEEP is secure

KEEP is secure by default since it inherits all the security features of Notes and Domino. All access to the database is authenticated using JSON Web Token (JWT) and Scopes. Identity can be provided using Domino credentials and/or your Enterprise IdP (Identity Provider) like Keycloak or Active Directory. The databases or forms and views that can be accessed are explicitly listed. Security extends to a field level read/write control by The Barbican

Modern Java API (Java 8++)

Project KEEP uses redesigned Java APIs named Domino JNX (Domino Java Next), which follow industry standards and best practices.

Public API based on OpenAPI 3.0

We follow the API first design with full interactive documentation. Our public APIs follow the standards set by OpenAPI 3.0. The OpenAPI specifications you see in Swagger/Redoc on the server are used dynamically by KEEP to validate requests, so you know they are up-to-date.

Extensible architecture

KEEP has an extensible architecture that allows it to serve multiple API versions from a Domino server. We currently support admin, core, CI/CD and PIM APIs but KEEP can be extended to add more APIs.

Web GUI for Schema, Scope and App management

We provide a Web UI that facilitates managing schemas, scopes and applications.

Design, admin and data

Along with the application design and admin features, KEEP allows CRUD operations on documents, retrieval of collections (aka views and folders), execution of queries and submission of access control, design and code, while maintaining and extending Domino’s security model.

Low barrier to entry

KEEP runs on Domino and/or your Notes Client on Windows/Linux/Mac. Someone with previous working experience of Notes and Domino can quickly get started with KEEP, as you are about to find out for yourself!

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