Apache APISIX is a dynamic, real-time, high-performance API gateway built on NGINX and etcd that handles both north-south and east-west traffic in cloud-native environments.
APISIX solves the problem of managing API traffic in microservice architectures by providing dynamic routing and hot-loading of plugins without requiring gateway restarts. Built on NGINX and etcd, it enables real-time configuration updates and supports traditional API gateway features including load balancing, dynamic upstream selection, canary releases, circuit breaking, and authentication. The tool can function as a Kubernetes ingress controller and serves dual roles as both an API gateway and an AI gateway, the latter offering AI proxying to route traffic across multiple LLM providers through a unified interface, token-based rate limiting for cost control, and security features for AI workloads.
Teams managing microservice architectures benefit most from APISIX, particularly those operating in Kubernetes environments or requiring frequent configuration changes without downtime. The AI gateway capabilities make it suitable for projects integrating large language models or AI agents that need load balancing and fallback strategies across multiple providers. The tool's plugin system provides flexibility for custom traffic management logic. The README does not compare APISIX to alternative API gateways.
The project maintains active development with regular updates to its core gateway functionality and ongoing expansion of its AI gateway capabilities, including recent additions like the mcp-bridge plugin for converting stdio-based MCP servers to HTTP SSE services. The codebase is primarily written in Lua, leveraging LuaJIT for performance-critical operations within the NGINX environment.
