CORS & Proxy Gov

What problem does it solve?

Government networks and enterprise firewalls often block direct browser requests to external APIs, making MVPs or front-end apps unable to fetch data from services like Dados Abertos, PNCP, ViaCEP, and BrasilAPI. This skill provides a layered strategy to overcome CORS and network restrictions in public sector environments, including testing without a proxy, using public proxies for prototyping, and deploying lightweight self-hosted proxies or Nginx configurations for production use.

Core Features & Use Cases

• Direct access first: Validate whether the target API allows CORS from the browser without any intermediary.
• Public proxy for prototyping: Quick, disposable proxy options to unblock development when production proxies are not yet in place (not recommended for production data).
• Self-hosted proxy options: Lightweight Node.js proxy (Coolify/Easypanel) to add a controlled CORS layer, plus guidance for an Nginx reverse proxy for more robust deployments.
• Operational guidance: Clear layering, origin whitelisting, timeouts, and security considerations for deployments in gov networks.

Quick Start

Start by testing direct browser access to the external API and, if blocked, deploy a lightweight proxy on your hosting platform and update your frontend to route API calls through it.