What to put in base_url, and Bearer vs x-api-key.
Always https://api.router.ai/v1. Mind the trailing /v1 — omitting it returns 404,
and doubling it (/v1/v1) does too.
The standard header is:
Authorization: Bearer sk-your-tokenSome Anthropic-ecosystem clients send x-api-key instead; we accept both.
If a client sends both headers, we use whichever carries the sk- prefix.
OPENAI_BASE_URL / OPENAI_API_KEY
OpenAI(base_url=..., api_key=...)
new OpenAI({ baseURL, apiKey })