The ZOO-Project has been a cornerstone in the evolution of geospatial web processing services, starting with its foundational support for the Web Processing Service (WPS) standard and now embracing the next-generation OGC API - Processes. This presentation will take you on a journey through the ZOO-Project’s transformation, showcasing its role in advancing geospatial interoperability and accessibility. From its early days as a robust WPS implementation to its current alignment with the OGC API - Processes standards—Part 1: Core and Part 2: Deploy, Replace, Undeploy—the ZOO-Project has consistently pushed the boundaries of geospatial service development. A key highlight is its integration with the Common Workflow Language (CWL), which is specifically used with OGC API - Processes - Part 2: Deploy, Replace, Undeploy to enable seamless deployment, management, and orchestration of complex geospatial workflows. Certified by the OGC as a Reference Implementation for WPS 2.0 and OGC API - Processes: Part 1: Core, the ZOO-Project exemplifies best practices in the field. As a key component of the EOEPCA+ European Space Agency project, it continues to play a pivotal role in Earth Observation (EO) data processing. Through real-world examples and demonstrations, this session will illustrate how the ZOO-Project bridges the gap between traditional and modern geospatial standards, empowering developers and organizations to tackle today’s geospatial challenges.