Based on deliverable D4.1 General purpose integration platform (in which we carry out the implementation of a general purpose architecture) and deliverable D4.2 Expert Platform for Biodiversity Data Validation, and taking into account the feedback received from the experts in different co-design sessions of both services, Bineo Consulting presents Cos4Env, a service whose main mission is to create an ecosystem that experts studyingEnvironmental variables related to Citizen Science can use to carry out searches and downloads quickly and in a standardised way, generating data sets from different sources of information, such as citizen observatories. Deliverable related to Cos4Env portal.