For anyone working on a nextjs project, who's struggling with GraphQL Error (Code: 429), here's a quick fix.
The back story...:
I built a headless CMS using Hygraph and NextJS 13 for a blog project. I also used the npm graphql-request package. I originally wanted to have it run on a server, but ended up deciding to use static generation so I could host the site using a simpler/less expensive hosting package. Up to the point where I had 10 posts, everything worked fine. Once I increased the number of posts, I got the error 429! Apparently Hygraph has a cap on requests per second based on the type of package you're using (I'm on the free one), so once you hit that cap, you'll get this error.