expo-api-routes

To keep server-side secrets out of your Expo Router client app, implement API routes using +api.ts files under the app/api directory. This ensures sensitive keys remain on the server while the client makes safe requests.

Expo Router API routes are server-side endpoints created with +api.ts files that process HTTP requests securely. Use them when handling sensitive credentials or running server logic like database operations to prevent exposing secrets to the client.

Create a REST endpoint with dynamic routes in Expo Router by adding a +api.ts file and using named exports per HTTP method. You can handle dynamic route segments like users/[id] to manage structured resources and return Response.json.

Yes, you can use environment variables for API keys in EAS Hosting and Cloudflare Workers by reading secrets from process.env. Configure these variables for local development and production to keep credentials secure.

To configure CORS for web clients in Expo API routes, implement web-ready CORS headers within your +api.ts file. This allows your endpoints to support browser clients and handle cross-origin requests safely.

Expo API routes on Cloudflare Workers face limitations requiring Web APIs and edge-friendly database options. You must adapt server logic to fit EAS Hosting constraints, ensuring your code relies on standard Web APIs instead of Node-specific modules.