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A gRPC experimental server that adds koa-like interceptors (middleware) to gRPC calls. Current stable version is 1.3.1. The package wraps the official grpc package and provides a middleware pattern similar to Koa.js for handling unary, client streaming, server streaming, and bidirectional streaming calls. It simplifies adding cross-cutting concerns like logging, tracing, and authentication. The package requires peer dependency grpc ^1.22.2 and is specific to Node.js. It is distinct from other gRPC middleware solutions by its Koa-style request/response pipeline.