The Vercel Sandbox firewall now supports forwarding specific HTTP requests to a proxy you control. You can also use matchers to filter forwarding and credentials brokering to only the requests that need it. Link to heading Requests proxying You can now route outbound sandbox traffic through your own proxy for logging, debugging, or transforming requests and responses. Set a forwardURL on any allowed domain, and the firewall will forward matching HTTPS requests to your server. The proxy receives the original request along with additional headers to identify the source: vercel-forwarded-host : The original request's SNI vercel-forwarded-scheme : The original request's scheme vercel-forwarded-port : The original request's port vercel-sandbox-oidc-token : A Vercel-issued OIDC token that the proxy can use to authenticate the request and identity the source team / project / sandbox.…