Connect to an OpenAI Responses-compatible API with browser-accessible CORS headers.
Enter the API root, usually ending in /v1. The page calls /models and /responses.
/v1
/models
/responses
Good for endpoints that need an API key, e.g. OpenRouter (https://openrouter.ai/api/v1). You will be prompted for the token the first time it is needed. It is stored only in this browser, keyed by the endpoint URL, and is never included in the shareable URL fragment.
https://openrouter.ai/api/v1
Configuration, including header values, is saved in this browser and encoded in the URL fragment. Fragments are not sent in HTTP requests, but avoid sharing a URL that contains secrets — for API keys, use the bearer token option above instead.
This is stored as the first system-role item and included whenever the browser replays the conversation.
Request settings Settings are fixed for this conversation and included in every request and copied JSON payload.
Sent as reasoning.effort. Support varies by model.
reasoning.effort