Free course

Web APIs Course

Design and build a production-shaped TypeScript API with Hono, SQLite, validation, OpenAPI, consistent errors, security boundaries, tests, and operational logs.

5 modules · 25 lessons · No signup

Prerequisites: TypeScript, Node.js, HTTP and SQLite

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What you'll learn

Build, document, test, secure, and prepare a resource-oriented Books API for a compatible production release.

Course contents

  1. API foundations

    Design the contract, start Hono on Node.js, return JSON, and inspect HTTP exchanges.

    1. ✓ Design the Books API
    2. ✓ Create a Hono Node project
    3. ✓ Return the first resource
    4. ✓ Inspect requests and responses
    5. ✓ Check your understanding: api foundations

  2. Routes and errors

    Read parameters, create and change resources, and return consistent problem responses.

    1. ✓ Read path and query parameters
    2. ✓ Create resources with POST
    3. ✓ Update and delete resources
    4. ✓ Standardize API errors
    5. ✓ Check your understanding: routes and errors

  3. Validation and data

    Validate runtime input, persist SQLite data, bind SQL values, and paginate collections.

    1. ✓ Validate unknown input
    2. ✓ Design the SQLite schema
    3. ✓ Write parameterized queries
    4. ✓ Paginate, filter, and sort
    5. ✓ Check your understanding: validation and data

  4. Contracts and security

    Describe OpenAPI, configure CORS, place auth boundaries, and handle retries and abuse.

    1. ✓ Describe the API with OpenAPI
    2. ✓ Configure CORS deliberately
    3. ✓ Place the authentication boundary
    4. ✓ Handle retries and abuse
    5. ✓ Check your understanding: contracts and security

  5. Test and ship

    Test handlers and data, add safe observability, and prepare a compatible release.

    1. ✓ Test handlers with requests
    2. ✓ Add database integration tests
    3. ✓ Add request IDs and structured logs
    4. ✓ Prepare a compatible release
    5. ✓ Check your understanding: test and ship