expo-api-routes

Expo Router lets you build serverless APIs by creating route files to handle HTTP methods, parse JSON requests, and return responses. Deployed on EAS Hosting, these routes execute server-side logic securely without needing a separate backend repository.

Expo API routes support environment variable management for secrets, allowing you to securely store API keys and database credentials on the server. This keeps sensitive data hidden from the client while remaining accessible during server-side execution.

Suggested cloud database options for Expo Router on EAS Hosting include Cloudflare D1, Turso, PlanetScale, Supabase, and Neon. You can connect to these databases directly from your API routes to perform secure server-side data operations.

Yes, EAS Hosting supports CORS configuration for Expo API routes. You can configure CORS headers within your Expo Router route handlers to control cross-origin requests, ensuring your serverless endpoints are securely accessible to authorized web clients.

The Cloudflare Workers runtime in Expo API routes has specific limitations regarding Node.js compatibility, requiring alternative Web API usage for certain operations. You must account for these constraints when implementing complex server-side logic or proxying external APIs.

You can proxy external APIs securely using Expo Router by creating serverless API routes that forward client requests to third-party services. This pattern hides sensitive API keys within server-side environment variables, preventing client-side exposure.