Yeah, the API registration URL is a solid idea.
The Description box has a character limit, so I couldn't put in all the info I wanted for some APIs. Plus, I hit a limit while uploading, so I couldn't finish adding everything.
I'm not sure if this is the way to go, but it would be awesome if every important thing had its own URL and Description for the setup. Like, we need it for the API Key, Models, and Pricing/Limits. The model section would be for when a preset is just for the site in general—like my Cloudflare one—instead of a specific model. If it's already for a specific model like Gemini 2.5 Flash-lite, then we don't need that section. This might even keep the info more up-to-date so people don't always have to dig through the guide. Or would that be overcomplicating it? Just an idea! :)
*Edit
I totally blew it. I wasn't looking and missed the %api_key% part and the %source%, %target%, so I just put "YOUR API KEY" instead. Sorry, I'll get those fixed.

*Edit 2
Maybe we could add %region% to the Request header and something like %country_code% to the API URL? Some presets like Azure Translate actually require it.
URL: "https://api.cognitive.microsofttranslator.com/translate?api-version=3.0&to=hu"
H: "Ocp-Apim-Subscription-Region": "westeurope"
https://api.cloudflare.com/client/v4/accounts/CLOUDFLARE_ACCOUNT_ID/ai/run/@cf/deepseek-ai/deepseek-r1-distill-qwen-32b. It would be great if we had a placeholder for that as well.