Where do I place API route files in an Expo project?

API routes are stored within the 'app' directory and must use the '+api.ts' suffix, such as 'app/api/users+api.ts', to be recognized by Expo Router.

How should I handle environment variables for my API routes?

Use 'process.env' for secrets. Locally, store them in a '.env' file; for production, use 'eas env:create' or the Expo dashboard to manage secrets securely.

How do I deploy Expo API routes to production?

You can deploy your API routes using the Expo Application Services (EAS) CLI by running the 'eas deploy' command, which hosts them on Cloudflare Workers.

Can I use standard Node.js modules like 'fs' in Expo API routes?

No. Expo API routes run on Cloudflare Workers, which uses a V8 isolates runtime. You must use Web APIs (like fetch and SubtleCrypto) instead of native Node.js modules.

Expo API Routes

Name: Expo API Routes
Author: expo

byexpo

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API Development

Builds and deploys server-side API routes within Expo Router applications for secure backend operations.

The Expo API Routes skill provides specialized guidance for implementing server-side logic directly within Expo projects using the Expo Router framework. It enables developers to handle sensitive operations—such as managing API secrets, performing database queries, and processing webhooks—that must remain off the client device. By following these patterns, developers can seamlessly build, test locally, and deploy serverless functions to EAS Hosting on Cloudflare Workers, ensuring high performance and security for mobile and web applications.

Key Features

01Optimized configuration for EAS Hosting and Cloudflare Workers edge runtime.

02Implementation of server-side secrets and secure database operations using +api.ts files.

031,643 GitHub stars

04Support for full RESTful patterns including GET, POST, PUT, DELETE, and dynamic routing.

05Best practices for CORS, authentication middleware, and error handling in serverless environments.

06Guidelines for request handling including headers, query parameters, and JSON body parsing.

Use Cases

01Implementing server-side validation and heavy computation that would be inefficient on mobile devices.

02Creating secure proxies for third-party APIs like OpenAI, Stripe, or GitHub to hide sensitive keys.

03Building webhook endpoints to receive and validate external service callbacks.

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add expo/skills expo-api-routes

For use in Claude.ai and ChatGPT