hi, to me this sounds like you are going into the direction of openrouter.

It's tools that you can install from open webui

https://openwebui.com/tools

they had at some point start earning money.

SearXNG is fast, its mostly the code that triggers the searches. Because, my daily is chatgpt, i still did not try to tweak it.

That's what i have together with open webui and gpt-oss-120b. it works reasonably well. But sometimes the searches are slow.