Cursor

Cursor’s BYOK is OpenAI-compatible only. It verifies the endpoint by calling GET /v1/models and expecting a 200 — which OpenGateway returns for any valid-looking key.

1. Settings → Models → API Keys → Override OpenAI Base URL:

   Base URL: https://api.opengateway.one/oss/v1
   API key:  YOUR_KEY

2. Cursor calls GET /v1/models to verify. OpenGateway returns the OpenAI list shape with 200, so verification passes.

3. Add a model with + Add Custom Model, e.g. claude-turbo-hub-qwen3-coder.

Cursor client-side caveats

• The base-URL override is global and also reroutes Cursor’s own models; Cursor periodically auto-disables the toggle. Re-enable as needed.
• Vision/multimodal requests hit a hardcoded api.openai.com validation in Cursor that ignores the override — text works, images may not. This is a Cursor-side limitation, not a gateway one.

See Model discovery for why the 200 requirement matters and how the dual-shape endpoint satisfies it.