The new REST API Source toolkit from dltHub is a Python-only high-level approach to pipelines, aiming to simplify pipeline creation by leveraging declarative configuration. The tool is designed to be autonomous, flexible, and easy to use, allowing users to build pipelines with LLMs and generate new pipelines efficiently. It offers two interfaces: a declarative source builder and an imperative client, providing a balance between autonomy and commercial product quality. The toolkit is particularly useful for companies with many pipelines that frequently create new ones, data platform teams, freelancers, and agencies. Users can configure the pipeline by specifying the base URL, endpoints, authentication, pagination, and incremental configuration, making it easy to adapt sources to changes.