jina-ai/serve

Jina-serve is a Python framework for building AI-powered services and deploying them at scale. The problem it solves is the gap between building an AI model locally and actually running it as a real service that other software can call, whether that's a single program, multiple connected services, or a full cloud deployment. The core idea is built around three layers. First, data: you define the shape of what goes in and comes out of your AI (text prompts, images, generated results, etc.) using structured document objects. Second, serving: you wrap your AI model in what the framework calls an "Executor", a class that receives these documents, runs your model, and returns results. Executors talk to the outside world via gRPC (a fast communication protocol commonly used in production systems), HTTP, or WebSockets. Third, orchestration: you can deploy a single Executor as a "Deployment," or chain multiple Executors together into a "Flow", a pipeline where one step feeds the next, like a text generator followed by an image generator. Scaling is built in. You can add replicas (multiple copies of your service running in parallel) and configure dynamic batching, which groups incoming requests together so your model processes them more efficiently. For AI language models specifically, the framework supports streaming output, sending tokens to the user one by one as they're generated rather than waiting for the full response. You'd reach for Jina-serve when you want to turn a locally-working AI model into a production service without writing all the networking and scaling infrastructure yourself. Deployment targets include Docker Compose, Kubernetes, and the framework's own cloud platform. It's written in Python.