OpenAIRE APIs for data access to third party services

The OpenAIRE infrastructure services populate and provide access to a graph of objects relative to publications, datasets, people, organizations, projects, and funders aggregated from a variety of data sources. Not only, objects in the graph are harmonized to achieve semantic homogeneity, de-duplicated and merged, and enriched by inference with missing properties and/or relationships. The aim of this technical report is to describe to third-party service managers (developers in the need of accessing data) how the OpenAIRE information space can be accessed and according to which combination of protocol and format. The document is organized according to a data centric view, where managers should first identify the typology of data they would like to access, and then verify which protocols and formats are available.