OpenAI compatible clients are basically any app that uses the OpenAI API format - so yeah, Cursor, Cline, Windsurf, Goose, plus things like ChatGPT wrappers, AI coding assistants, etc.

To test via routstr when proxy is running, you'd make requests to your proxy endpoint instead of OpenAI's. The proxy handles the eCash payments behind the scenes.

Re: nsec env var - that's probably for signing nostr events. Typical dev docs being incomplete as usual 🙄