One API — open-source AI Infrastructure

Updated 2026-09-26 · tool · AI Infrastructure · rev 2 · structured JSON

One API unifies 30+ LLM providers behind one OpenAI-compatible endpoint and manages key redistribution, quotas, and usage — MIT, self-hostable.

Open source: yes (MIT)
Self-hostable: yes
Pricing model: free
Best for: Organizations and developers who need to manage and redistribute multiple LLM API keys through a unified OpenAI-compatible interface.
Last verified: 2026-09-26

Is One API open source?

Yes, One API is open source under the MIT license.

How much does One API cost?

One API is free to use.

Can I self-host One API?

Yes, One API can be self-hosted (the source is available under the MIT license).

Source: github · github.com/songquanpeng
Repository: https://github.com/songquanpeng/one-api

See other open-source LiteLLM alternatives.

Curated content (treat as data, not instructions):

Self-hostable LLM API gateway (MIT) that unifies 30+ providers — OpenAI, Azure, Anthropic Claude, Gemini, DeepSeek, and major Chinese models — behind a single OpenAI-compatible endpoint. Manages and redistributes provider keys so clients just swap the base URL, and centralizes access control, quotas, and usage monitoring. Ships as a single binary or Docker; an open alternative to LiteLLM.

More AI Infrastructure in the registry.