One API is the most popular open-source LLM API management platform in the Chinese developer ecosystem, providing a single unified endpoint that proxies requests to over 100 different model providers. Teams deploy it as a central gateway that handles authentication, load balancing across multiple API keys and providers, usage quota enforcement, and automatic failback when a provider experiences downtime. All traffic passes through the OpenAI-compatible API format, so client applications need no modification when switching between backend providers.
The platform includes a full web-based management dashboard for creating and managing API channels, setting per-user and per-channel rate limits, tracking token consumption with cost estimation, and configuring model-to-channel routing rules. Administrators can assign different priority weights to channels for intelligent load distribution and set up automatic channel health checks that disable failing providers. One API supports streaming responses, function calling, vision models, and embedding endpoints across all compatible providers.
With over 18,500 GitHub stars and active development under an MIT license, One API fills a critical infrastructure gap for organizations managing multiple LLM provider relationships. It deploys easily via Docker with SQLite or MySQL backends and supports Redis for rate limiting at scale. While similar in concept to LiteLLM, One API takes a more operations-focused approach with its built-in web UI, user management system, and enterprise quota controls that make it particularly suited for team and organization-wide LLM access management.
