API Integration & Webhooks
The sequel to API Tutorial -- 25 lessons on the parts of real API integration that tutorial doesn't cover: webhooks, a real Postman workflow, reliability engineering (idempotency, timeouts, backoff), secret management, response validation, documentation reading, and full third-party integration architecture, closing with a webhook receiver, a Postman collection, and a complete integration project.
25 Lessons · 650 min · Learning Platform Editorial Team
What you need on the desk
- None strictly required -- Postman lessons describe the workflow conceptually
- Optionally the free Postman desktop or web app, for following along with the Postman lessons directly
- A Node.js or Python environment, to run the JavaScript/Python examples
Know this much before you start
- Recommended: the API Tutorial (apiguide) course, or equivalent comfort with REST basics, HTTP methods, status codes, and simple API-key/Bearer-token authentication.
- Comfortable reading small JavaScript or Python snippets -- most lessons include a genuinely runnable example.
- This course does not re-teach API fundamentals -- it picks up exactly where a beginner API course stops: webhooks, testing workflow, reliability, and integration architecture.
By the end, you can
- Design timeout, retry, and backoff strategy for API calls without risking duplicate side effects
- Explain idempotency and apply it to safely retry both outbound requests and inbound webhook deliveries
- Architect a backend-proxy pattern so secret API credentials never reach browser code
- Validate third-party API responses instead of trusting them blindly, and fail safely when they're malformed
- Build, verify, and safely process an incoming webhook, including signature verification and idempotent handling of retried deliveries
- Use Postman as a real testing tool: environments, variables, collections, and structured test cases covering more than the happy path
- Read unfamiliar API documentation systematically and evaluate a raw HTTP API against an available SDK
- Design and build a complete third-party integration: architecture, credential handling, rate-limit handling, validation, and logging