HttpFixer vs CORS Anywhere

CORS Anywhere is a proxy that bypasses CORS by routing requests through a server that adds CORS headers. It's a workaround for development or third-party APIs. HttpFixer fixes your actual CORS configuration on your own server.

When each tool is appropriate

Use CORS Anywhere when

• You're calling a third-party API that you don't control and it doesn't support CORS
• You're in development and need a quick workaround for local testing
• You need to prototype quickly before the proper backend fix

Use HttpFixer when

• You control the API server and need to configure CORS properly
• You have a CORS error in production that needs a real fix
• You need to understand exactly which headers are missing and why
• You want framework-specific config (Express, FastAPI, Nginx, Cloudflare Workers)

Why CORS Anywhere is not a production solution

• Single point of failure: If the proxy goes down, your app breaks
• Latency: Every request routes through an extra server
• Security: Requests pass through a third-party server — not appropriate for authenticated requests
• Rate limits: The public CORS Anywhere instance has strict rate limits
• Credentials: Cannot combine wildcard CORS with credentials — so authenticated CORS via proxy doesn't work

The proper fix

# On YOUR server — Nginx
if ($request_method = OPTIONS) { add_header Access-Control-Allow-Origin "https://app.example.com"; add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS"; add_header Access-Control-Allow-Headers "Content-Type, Authorization"; return 204;
}
add_header Access-Control-Allow-Origin "https://app.example.com" always;