The Extensible Quality Standard for Institutional Publishing (EQSIP), developed by DIAMAS, seeks to ensure the quality and transparency of governance, processes and workflows in institutional publishing and addresses the seven core components of scholarly publishing outlined in the Diamond OA Action Plan, which were subsequently revised and modified by the DIAMAS project team (Quality evaluation criteria, best practices, and assessment systems for Institutional Publishing Service Providers (IPSPs) https://doi.org/10.5281/zenodo.7859172). The EQSIP is being developed in two stages: the first version, EQSIP 1.0 available at https://doi.org/10.5281/zenodo.7923916 and presented in this poster, is based on an analysis of the existing standards, best practices, evaluation criteria, guidelines and recommendations which have been identified as relevant for institutional publishers. EQSIP 1.0 is aspirational: it represents an attempt at outlining what we believe is an ideal quality level that Diamond OA IPSPs would adhere to. This emphatically does not imply that Diamond OA IPSPs are currently expected to conform to this standard. EQSIP 1.0 should be seen as an aspirational gold standard for IPSPs, but also as a pathway for building future tools, aids and guidelines that will help academic journals and publishers to achieve this goal. EQSIP 1.0 will be further tested with a representative sample of IPSPs and the results of the testing will be used to develop EQSIP 2.0 versions that are best suited for specific scholarly disciplines, regions, and languages. The various versions of EQSIP 2.0 will only be fully implemented once all the necessary infrastructure for supporting Diamond OA IPSPs is in place. PALOMERA, CRAFT-OA and other projects supporting Diamond OA will help DIAMAS in EQSIP testing and dissemination.