TL;DR

I built cursor-openai-api, a small HTTP server that speaks OpenAI’s API but routes every request through the Cursor SDK. Point any OpenAI client (like OpenCode, OpenClaw, your own scripts, whatever) at it, and you get Composer 2.5 (and every other model Cursor exposes) with your Cursor plan’s usage.

And the timing is good: Cursor just announced Composer via the SDK is 90% off this…