The Langflow client is a JavaScript library that allows developers to integrate the power of Langflow into their Node.js applications, enabling them to build generative AI flows and agents with ease. The client provides an easy-to-use API for interacting with the Langflow API, which can be used to make calls directly or through the client. The client supports both DataStax-hosted and self-hosted versions of Langflow, and requires an OpenAI API key to run. Developers can use the client to initialize a client, run flows, and access the flow response, with features such as tweakable components and flexible settings. The library is open-source and available on GitHub, and provides a complete data API and out-of-the-box integrations for building production RAG apps with high relevancy and low latency.