APIs & Integration
RESTful APIs, GraphQL, Firebase, WebSocket, gRPC & more
API design and integration is a core skill — this learning path takes you from REST fundamentals through GraphQL, Firebase, and enterprise web services.
What You’ll Learn
- RESTful API design with HTTP methods, resources, and status codes
- GraphQL schema-driven APIs with queries, mutations, and subscriptions
- Firebase BaaS for serverless authentication and real-time databases
- Enterprise web services with SOAP, WSDL, and XML-RPC
Why APIs Matter
Every modern application communicates through APIs. Understanding how to design, build, and consume them is essential. DodaTech’s Durga Antivirus Pro uses a combination of RESTful endpoints for threat intelligence, GraphQL for the dashboard, Firebase for user authentication and device sync, and enterprise web services for partner integrations — making API knowledge central to our engineering team.
flowchart LR
subgraph "API Learning Path"
A["Web Services\n(SOAP, WSDL)"] --> B["RESTful APIs\n(You are here)"]
B --> C["GraphQL"]
B --> D["Firebase\nBaaS"]
end
style B fill:#dbeafe,stroke:#2563eb
Start with RESTful APIs — the most widely adopted API standard — then explore GraphQL for flexible data fetching, Firebase for serverless development, and web services for enterprise patterns.
Recommended Path
| Order | Topic | Why Start Here |
|---|---|---|
| 1 | Web Services | Historical foundation — understand how APIs evolved |
| 2 | RESTful APIs | Most widely used API standard — essential knowledge |
| 3 | GraphQL | Flexible alternative for complex data requirements |
| 4 | Firebase | Serverless BaaS — build apps without backend management |
What’s Next
| Topic | Description |
|---|---|
| Start RESTful APIs Guide | Begin with the most widely-adopted API standard |
| HTTP Protocol Guide | Foundation protocol for all web APIs |
| JSON Data Format | Common data format for API requests and responses |
| Python for Backend | Build API servers with Python and Django/Flask |
Published Topics
Firebase Complete Guide: BaaS Platform for Modern App Development
Master Firebase: real-time database, authentication, cloud functions, hosting, and security rules. Build full-stack apps without managing backend servers.
✓ LiveGraphQL Complete Guide: Schema-Driven API Design from Scratch
Master GraphQL: type system, schemas, queries, mutations, resolvers, and architecture patterns. Build flexible APIs that let clients request exactly what they need.
✓ LiveRESTful APIs Complete Guide: From Basics to Best Practices
Master REST API design with this comprehensive guide covering resources, HTTP methods, statelessness, caching, and security for building scalable web services.
✓ LiveWeb Services Guide: SOAP, WSDL & Enterprise Integration
Master web services: SOAP protocol, WSDL contracts, XML-RPC, service-oriented architecture (SOA), and when to choose SOAP over REST or GraphQL for enterprise systems.
✓ LiveStripe Payment Integration: Complete Developer Guide
Learn Stripe payment integration: payment intents, checkout sessions, webhooks, refunds, subscription management, Stripe Elements, testing with test mode, and idempotency keys.
✓ LiveTwilio API: Sending SMS and Voice Messages
Learn Twilio API: send SMS and WhatsApp messages, make voice calls, use Verify API for phone verification, handle incoming messages via webhooks, error handling, and pricing.
✓ LiveSendGrid: Transactional Email API Guide
Learn SendGrid: send transactional emails via SMTP and REST API, dynamic templates, personalization, attachments, delivery tracking (opens, clicks), suppression management, and sender reputation.
✓ LiveOAuth 2.0: Complete Developer Guide with Examples
Learn OAuth 2.0: authorization code flow, implicit, client credentials, PKCE, access and refresh tokens, scopes, providers (Google, GitHub), libraries (Passport.js, Spring Security), and security.
✓ LiveAPI Versioning: Strategies and Best Practices
Learn API versioning strategies: URL versioning (/v1/), header versioning (Accept header), query parameter versioning, breaking vs non-breaking changes, deprecation policies, backward compatibility.
✓ LiveAll 25 topics in APIs & Integration are published.