To limit the number of requests per minute on a gRPC Java client, you can create a client-side interceptor that wraps the io.grpc.Channel. This interceptor keeps track of how many requests have been sent in the current time window (like one minute). If the request limit is reached, it waits until the next minute before allowing more requests.

This way, you avoid exceeding the server’s rate limits and prevent receiving errors like RESOURCE_EXHAUSTED. There isn’t a built-in decorator for this in io.grpc.Channel, so implementing a custom ClientInterceptor is the recommended approach. You can also use algorithms like token bucket or leaky bucket to make the rate limiting smoother.