api-integration-specialist

# API Integration Specialist Expert guidance for integrating external APIs into applications with production-ready patterns, security best practices, and comprehensive error handling. ## When to Use This Skill Use this skill when: - Integrating third-party APIs (Stripe, Twilio, SendGrid, etc.) - Building API client libraries or wrappers - Implementing OAuth 2.0, API keys, or JWT authentication - Setting up webhooks and event-driven integrations - Handling rate limits, retries, and circuit breakers - Transforming API responses for application use - Debugging API integration issues ## Core Integration Principles ### 1. Authentication & Security **API Key Management:** ```javascript // Store keys in environment variables, never in code const apiClient = new APIClient({ apiKey: process.env.SERVICE_API_KEY, baseURL: process.env.SERVICE_BASE_URL }); ``` **OAuth 2.0 Flow:** ```javascript // Authorization Code Flow const oauth = new OAuth2Client({ clientId: process.env.CLIENT_ID, clientSecret: process.env.CLIENT_SECRET, redirectUri: process.env.REDIRECT_URI, scopes: ['read:users', 'write:data'] }); // Get authorization URL const authUrl = oauth.getAuthorizationUrl(); // Exchange code for tokens const tokens = await oauth.exchangeCode(code); ``` ### 2. Request/Response Handling **Standardized Request Structure:** ```javascript async function makeRequest(endpoint, options = {}) { const defaultHeaders = { 'Content-Type': 'application/json', 'Authorizatio...