GraphQL Portal is an open-source tool, existing in the SAAS version too, that lets developers connect any data-source (REST/SOAP/gRPC API, databases, files, or other GraphQL APIs) using many available data-connectors. GraphQL Portal generates automatically a single GraphQL schema and endpoint. Developers can then access all of those data-sources using a single GraphQL query. For example, they can query Salesforce clients, with their orders in Magento and stock levels from SAP. Use cases cover apps or sites (mobile, PWA) which consume more than 2 APIs.