A method and system for generating application programming interfaces (APIs) in a codeless manner. A set of data graphs is generated. The data graphs identify relationships between data objects included in a description of a database schema of a database. The APIs are generated based on the set of data graphs. The APIs are provided to a user for selecting an API of the APIs. A JavaScript object notation based model (JSON-based model) associated with the selected API is generated, wherein the selected API is added to an application that uses the selected API for exchanging data with the database using the JSON-based model.