expo-api-routes

To create server-side API routes in Expo Router, you add files like app/api/hello+api.ts that export HTTP method handlers. This approach keeps server-side secrets, API keys, and database credentials out of client bundles by using environment variables and protected endpoints.

You deploy Expo Router API routes to EAS Hosting by setting required environment variables locally and in EAS, then executing eas deploy. This ensures reliable server-side behavior for mobile apps running on the EAS platform.

Yes, Expo Router API routing works with Cloudflare Workers, but requires awareness of specific runtime limitations. The guidelines cover CORS headers, error handling, and recommended database options to ensure compatibility within the Cloudflare Workers environment.

To handle CORS and HTTP methods in Expo API routes, you export specific HTTP method handlers and configure CORS headers within your route files. The guidelines cover request parsing, dynamic route parameters, and error handling conventions.

To proxy third-party API calls securely, you create a protected /api endpoint that validates requests, proxies calls to an external provider using a server-side key, and returns sanitized JSON to the client. This keeps sensitive tokens out of the mobile app bundle.

Running Expo API routes on Cloudflare Workers involves specific runtime limitations affecting database access and heavy computations. The guidelines address these constraints by recommending compatible database options and proper error handling patterns for the edge environment.