Support modifying vercel.json during build step

[vinaypuppal]

I am trying to add some headers to the vercel.json file in my build step but they were not picked up by Vercel. I am writing the vercel.json file to the root of the project, so do I need to place the modified vercel.json file in some other directory or this is not supported?

[mcsdevv]

Hi @vinaypuppal, this is not something that's possible currently but may be added in the future.

If using Next.js, you can do this with the next.config.js file for most properties.

[vinaypuppal]

Thanks, @mcsdevv for the reply.

No, I am not using Next.js

We are building a more generalized tool to add security headers to static sites, it would be helpful if Vercel implements this feature soon.

[shaialon]

@mcsdevv - it would be really great if Vercel can match other technologies like Firebase and Netlify, to support this feature.

[orta]

For folks looking for this, I think (will try next week) you can use the build output API instead: https://vercel.com/docs/build-output-api/v3

[amyegan]

Hey folks! This discussion is a couple of years old now, so there have certainly been some changes since it was originally posted.

Edge Middleware available now. It lets you do things, like modifying headers or redirecting routes, in a more dynamic way than could be done with vercel.json configuration.