What is the SSH Open Marketplace?
The SSH Open Marketplace (SSHOMP) is a discovery portal for Social Sciences and Humanities (SSH) research communities, pooling tools, services, training materials, datasets, publications, and workflows into a single searchable environment.
But SSHOMP is not just a place to find resources: it is infrastructure you can build on. For national research initiatives, consortia, and projects, it opens up two complementary pathways that can dramatically reduce the effort required to achieve European-scale visibility — or to launch a full catalogue of digital humanities resources without building one from scratch.
Integration Pathway A: Curate Your Resources in SSHOMP and Make Them Discoverable
The most direct way to engage with SSHOMP is to contribute your own resources. Once your tools, datasets, or services are described in the Marketplace, they become discoverable by researchers across Europe and beyond — not as isolated entries, but as nodes in a rich, interconnected network.
SSHOMP’s data model goes well beyond a simple list of resources. Each entry can be linked to related tools, relevant datasets, supporting training materials, and documented workflows. This means that a researcher arriving at one of your resources immediately finds pathways to the broader ecosystem of methods and materials that surround it — a level of contextualisation that is very difficult to achieve in a standalone national catalogue.
Example: DARIAH.lab Poland
DARIAH.lab Poland — Poland’s national DARIAH infrastructure, based at the Poznań Supercomputing and Networking Centre (PSNC) — has contributed a substantial collection of resources to SSHOMP. These are browsable directly at marketplace.sshopencloud.eu/search?f.source=Dariah.lab+Poland, and include tools from the full spectrum of DARIAH.lab’s laboratory infrastructure: from source transcription and annotation services, to data analysis and visualisation tools, to linked open data utilities.
The image below illustrates what this integration looks like in practice: a visualisation of the relations network for a selection of DARIAH.lab Poland entries in SSHOMP. What is visible is not just a list, but a constellation of resources that are explicitly connected to one another — tools that depend on or complement each other, datasets that feed into workflows, services that share underlying components.
Figure 1. The relations network for selected DARIAH.lab Poland resources in SSHOMP, showing how tools, datasets, and services are interconnected within the platform.
What This Means for Other National Nodes
The Polish experience demonstrates that contributing to SSHOMP is not merely an act of visibility — it is an act of integration. Your resources become part of a living, cross-national graph of SSH methods and materials that researchers throughout Europe can explore and build upon. The process is supported by clear documentation and an editorial board that can guide national nodes through the curation process.
Integration Pathway B: Use SSHOMP as the Catalogue for Your Project or Initiative
Not every project has the resources — or the need — to build and maintain a dedicated catalogue infrastructure. SSHOMP offers a second, equally powerful model: use the Marketplace itself as the catalogue that underpins your project’s tools and services offer, without investing in a separate platform.
Rather than setting up a database, building a search interface, maintaining metadata standards, and keeping listings up to date in a silo, a project can instead describe its resources within SSHOMP, apply a consistent keyword tag, and surface that curated collection both on SSHOMP and on its own website — pointing users directly to the Marketplace entries. The result is a project catalogue that benefits from SSHOMP’s infrastructure, editorial support, persistent identifiers, and European discoverability from day one.
Example: ATRIUM
ATRIUM is a four-year Horizon Europe project bringing together four leading European research infrastructures — DARIAH, ARIADNE, CLARIN, and OPERAS — to support digitally-enabled arts and humanities research. Rather than building a standalone tool registry, the project hosts its entire Service and Software Catalogue on the SSH Open Marketplace. All 53 entries — spanning OCR and transcription tools, 3D heritage visualisation, linguistic analysis services, knowledge graph utilities, data repositories, and more — are described as SSHOMP records and tagged with the keyword “ATRIUM catalogue”.
The full collection is searchable at marketplace.sshopencloud.eu/search?f.keyword=ATRIUM+catalogue, and ATRIUM’s own website at atrium-research.eu/services directs users straight to this view. The project’s tools and services are accessible, discoverable, and cross-referenced within the broader European SSH resource network — with no separate catalogue infrastructure to build or sustain.
ATRIUM also used SSHOMP as the venue for developing its research workflows. In collaboration with the SSHOMP Editorial Team, the project co-organised a workshop at the 2024 DARIAH Annual Event where participants worked directly in the Marketplace to create and enhance entries, and began developing the first ATRIUM workflows — structured, reusable descriptions of research processes that link tools, datasets, and methods together.
Going Further: Double Visibility Through the SSHOMP API
For projects or institutions that want to go a step further — displaying SSHOMP resources directly inside their own portal, or keeping a local catalogue automatically in sync with the Marketplace — SSHOMP exposes a fully documented, open REST API at marketplace-api.sshopencloud.eu/api. Responses are in standard JSON format, the API is openly documented with full Swagger specifications, and a dedicated Python library with accompanying Jupyter notebooks makes it straightforward to explore, curate, and re-use SSHOMP data programmatically.
Double visibility, one source of truth. The most immediate benefit of API-based integration is that every resource you maintain becomes visible in two places at once: on SSHOMP, where it is discoverable by the whole European SSH research community and is part of the broader network of connected tools, datasets, and workflows; and on your own website, where you can present it in your own design, language, and editorial framing. You describe each resource once and it appears in both contexts, always in sync, with no duplicated effort and no risk of drift between a local and a European version. The German GKFI catalogue uses this approach, and so do other initiatives.
Curated data, not raw content. What you harvest through the API is not unvetted material: it is data that has already passed through the SSHOMP editorial process, structured according to consistent metadata standards, enriched with relationships to other resources, and reviewed by the community. This means a local portal powered by the API automatically inherits the quality assurance work of the SSHOMP editorial board — a significant benefit for smaller projects or institutions that do not have dedicated curation capacity of their own.
Interoperable by design. Because SSHOMP is part of the European Open Science Cloud (EOSC) and is co-governed by DARIAH, CLARIN, and CESSDA, data surfaced via the API is aligned with shared standards across the SSH cluster and beyond. Resources retrieved this way carry persistent identifiers, standardised vocabularies, and well-defined data types — which means they are not only displayable on your own site, but also reusable in downstream pipelines, citable in publications, and interoperable with other EOSC services and tools. Your local catalogue becomes, in effect, a trusted node in a much larger European research data graph.
The API also supports writing, not just reading — meaning that integration can be fully bidirectional. Updates or additions made in a local system can flow back to SSHOMP, ensuring that the European-level record stays current without any double data entry. For projects that already maintain structured information about their tools and services, this makes the step into SSHOMP considerably lighter.
Get in Touch
Whether you are a national DARIAH node looking to give your community’s resources European visibility, or a project that wants to launch a curated catalogue without building one from scratch, there is a tested, well-documented pathway available. The experiences of DARIAH.lab Poland and ATRIUM offer concrete models you can learn from and adapt.
DARIAH is actively supporting institutions and projects in exploring both integration models, and we are happy to advise based on existing solutions that are already working in practice.
Please reach out to Michael Kurzmeier at DARIAH. We can walk you through the options, connect you with the SSHOMP editorial team, and help you identify the pathway that best fits your context.
Further Resources