DOAI ProxyDefinitely OpenAI. (It's definitely not.)

An OpenAI-compatible API proxy with streaming and function calling — even when the provider supports neither.

Streaming Simulation

Converts non-streaming responses into SSE with simulated chunking, so your clients get real-time token delivery even from providers that don't support it.

Function Calling

Injects tool definitions into prompts, parses AI responses, and formats them as proper tool_calls objects — making function calling work with any model.

OpenAI Compatibility

Fully compatible API surface including /v1/chat/completions and /v1/models. Drop-in replacement for the OpenAI SDK — just change the base URL.

Provider Architecture

Extensible provider layer designed for easy integration of new backends. Currently powered by Straico, with more providers on the roadmap.