APIGen is an AI-powered tool designed for the creation of deployable APIs. Beginning with a user-provided prompt, it facilitates the design, construction, testing, and deployment of custom APIs ranging from connectors to entire backends. APIGen offers a dynamic code generation system, providing robust and adaptable code that adheres to best practice API standards. In addition to route, schema, and function creation, APIGen enables data store integration for API access. To ensure reliability and stability, multiple tests are generated and executed before deployment. The tool also provides robust security measures, including session management and authentication for every API generated. Among its other key features, APIGen offers intuitive instructions for generating working APIs, regardless of the level of specificity. It provides code export modifications and instant deployment to APIGen's cloud servers. Built-in functionality for user management, token generation, and data encryption are also provided to address data privacy concerns. Furthermore, the tool automates the process of documentation generation for every aspect of the newly created API. It also offers advanced business logic generation and seamless third-party API and database integrations. APIGen stands out with its capability to produce and deploy sophisticated, entirely functional APIs that meet optimal industry standards. The process of API creation is straightforward: the user inputs the prompt, verifies and modifies suggested routes and endpoints, checks schemas for each route, then adjusts the generated service code as required. Custom tests are conducted to ensure readiness for deployment. Finally, the API can be deployed or the code can be downloaded.