Web development and API integration

Integrating APIs and AI into your web applications

Consume and expose REST APIs, handle webhooks and integrate an AI model safely and under control.

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Level
Advanced
Indicative duration
28 h
Format
Online · On-site
Language
French
Price
On quotation

Learning objectives

  • Consume REST APIs robustly: authentication, pagination, rate limits, retries.
  • Design and document a simple REST API with OpenAPI.
  • Receive and process webhooks securely and idempotently.
  • Integrate an AI model through an API with structured outputs and cost control.
  • Apply security best practices: secrets, input validation, logging, personal data.
  • Test and monitor integrations in production.

By the end of this course, you will be able to design and build integrations with third-party APIs (payment, CRM, messaging, email) and AI model APIs in a web application: authentication, error handling, webhooks, secret management and cost control.

The course is firmly hands-on. Examples are given in JavaScript (Node.js) and PHP, the two environments we come across most often in web projects; participants work in the language of their choice. We cover consuming REST APIs, exposing a clean, documented API, receiving reliable webhooks and orchestrating asynchronous processing.

The last third is devoted to integrating a language model through an API: structuring calls, JSON outputs, tool calling, limiting costs, caching, protection against prompt injection and logging. The final project is to add an AI-assisted feature to an existing or provided application.

Who it is for

  • Junior and experienced web developers.
  • Freelance developers who build integrations for clients.
  • SME technical teams connecting their business tools.
  • Final-year computer science students.

Prerequisites

  • Hands-on web development experience in JavaScript, PHP or Python.
  • Basic knowledge of HTTP, JSON and Git.
  • A computer with a working development environment (editor, Node.js or PHP, Git).

Skills you will gain

  • REST APIs and HTTP
  • OAuth 2.0 and API keys
  • Webhooks
  • OpenAPI
  • Asynchronous jobs and queues
  • AI model API integration
  • Application security
  • Integration testing

Programme

  1. HTTP refresher and REST design

    4 h
    • Methods, status codes, headers, idempotency
    • Resources, URLs and API versioning
    • Reading API documentation efficiently
    • Tools: HTTP clients, request collections

  2. Consuming third-party APIs

    5 h
    • Authentication: API keys, OAuth 2.0, tokens
    • Pagination, rate limits and retries with backoff
    • Error and timeout handling
    • Case study: CRM, email service, messaging

  3. Exposing your own API

    5 h
    • Designing endpoints and formats
    • Input validation and error messages
    • OpenAPI documentation
    • Authentication and access control

  4. Webhooks and asynchronous processing

    5 h
    • Receiving a webhook: signature verification, fast response
    • Idempotency and duplicate handling
    • Queues and background jobs
    • Orchestration with a tool such as n8n where it makes sense

  5. Integrating an AI model

    5 h
    • Calling a model API: messages, parameters, model choice
    • Structured JSON outputs and validation
    • Tool calling and chaining steps
    • Costs: tokens, caching, per-user limits
    • Risks: prompt injection, data leakage, inaccurate answers

  6. Going to production and project

    4 h
    • Secret and environment management
    • Integration tests and API mocks
    • Logging, monitoring and alerts
    • Final project: presentation and code review

Exercises and projects

  • Write a robust API client with pagination, retries and rate-limit handling.
  • Design and document with OpenAPI a small API for managing contact requests.
  • Implement a webhook receiver with signature verification and duplicate protection.
  • Integrate an AI model that classifies incoming messages and returns validated JSON.
  • Final project: add an AI-assisted feature to an application, with tests, logging and a cost estimate.

Upcoming sessions

No public session is scheduled yet. Leave a request: we will let you know as soon as a date is set, or organise a session for your team.

How to enrol

How to enrol

  1. Fill in the enrolment request form on this page (name, email, phone, current role and expectations).
  2. We reply by email to check that the course matches your level and to share practical details.
  3. Scheduled sessions are announced on this page as soon as they are planned; if no date is shown, your request is recorded and you will be notified when the next session opens.
  4. Your enrolment is final once confirmed in writing by email.

Companies: to enrol several employees or arrange a dedicated in-house session, mention it in the form and we will send you a quote.

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