How to protect chat endpoint like in chat.vercel.ai

[aryadytm]

So I cloned this repo and used as a template for my next SaaS project, and I've been thinking to protect my endpoints from bots.

I noticed that the endpoint in the https://chat.vercel.ai/api/chat returns 429 Too Many Requests when I copy the full request using cURL to reproduce in Postman.

However, this protection functionality didn't seem exist in this source code (or am I missed something?), as I tried to request to my instance but it is still unprotected.

Any details about the implementation?

[BaileySimrell]

@aryadytm they probably are using this https://vercel.com/guides/add-rate-limiting-vercel