In 2021, the Scholarly Infrastructures of Research Software (SIRS) report, was published including a set of recommendations to allow EOSC to include software, in the scholarly ecosystem, next to publications and data. The SIRS report was built upon a survey and documentation of a representative panel of notable operational infrastructures across Europe, comparing their scopes and approaches. A subset of these Research Software infrastructures joined forces to turn the SIRS recommendations into reality through the FAIRCORE4EOSC project. One of the objectives of WP6 is to develop tools and services for archival, reference, description and citation of research software artifacts, by implementing the key recommendations of the EOSC SIRS report to interconnect scholarly repositories, publishers and aggregators with the Software Heritage universal source code archive, using the CodeMeta standard, and the Software Heritage intrinsic identifiers (SWHID). In this zenodo deposit, we have a snapshot of the six specifications documents created for the infrastructures that are contributing to the FAIRCORE4EOSC project as part of WP6. Three teams were assigned three tasks, each team developed for each infrastructure a specifications document to follow, the tasks are divided by infrastructure type: T6.1 API and Connectors Between Scholarly Repositories and Software Heritage [M1-M36] Lead: CERN, Participants: KNAW-DANS, GWDG, INRIA, FONDATION INRIA, DATACITE T6.2 API and Connectors Between Open Access Publishers and Software Heritage [M1-M36] Lead: LZI Participants: INRIA, FONDATION INRIA T6.3 API and Connectors Between Aggregators and Software Heritage [M1-M36] Lead: FIZ Participants: INRIA, FONDATION INRIA, DATACITE, OPENAIRE, LZI The RSAC sub-components specification documents by infrastructure type: Scholarly repositories: InvenioRDM - SWH SPECS DataVerse - SWH SPECS Publishers: Dagstuhl - SWH SPECS Episciences - SWH SPECS Aggregators: SwMath - SWH SPECS OpenAire - SWH SPECS The specifications documents are a blueprint for the development of the APIs and connectors from various scholarly infrastructures. Building APIs and connectors in different research software infrastructures for a more connected scholarly ecosystem is a significant step toward the realization of the SIRS report and its recommendations. In the SIRS report, long term preservation, describing research software with machine actionable metadata standards and the usage of the SWHID as persistent software artifact identification are part of the specifications submitted by the partners in the FAIRCORE4EOSC WP6. References SIRS report is the Scholarly infrastructures for research software: report from the EOSC Executive Board Working Group (WG) Architecture Task Force (TF)- https://doi.org/10.2777/28598