Advanced n8n: APIs, Webhooks, and Business Automation

Level: Intermediate–advanced
Recommended prerequisite: knowledge equivalent to the previous course.

This is where the professional integration part would truly begin.

Unit 1. APIs and Web Services

• What is an API.
• REST Architecture.
• Endpoints.
• GET, POST, PUT, PATCH and DELETE methods.
• Headers.
• Query parameters.
• Body.
• JSON.
• HTTP Codes.
• Authentication using API Key.
• Bearer Tokens.
• OAuth 2.0.
• Advanced use of HTTP Request.
• Reading API documentation.
• Service integration without specific node.

Practice: integrate n8n with an external API using HTTP Request.

Unit 2. Webhooks and event-driven architectures

• What is a webhook.
• Webhook Trigger.
• Test URL and Production URL.
• Receiving external data.
• Information validation.
• HTTP responses.
• Application integration using webhooks.
• Real-time automations.
• Forms and external applications.
• Basic endpoint security.

Practice: develop a simple API using n8n as an automation backend.

Unit 3. Advanced Workflows

• Advanced expressions.
• Handling complex JSON structures.
• Loops.
• Batch processing.
• Advanced Merge.
• Subworkflows.
• Execute Workflow.
• Reusable Workflows.
• Environment Variables.
• Code Node.
• Introduction to JavaScript applied to n8n.
• Transformations that cannot be performed using only visual nodes.
• Handling files and binary data.

Practice: mass processing of records from different sources.

Unit 4. Reliability, errors, and production

• Types of errors.
• Error workflows.
• Retry.
• Continue on Fail.
• Exception capture and handling.
• Logs.
• Debugging.
• Execution monitoring.
• Idempotency.
• Prevention of duplicate executions.
• Rate limits.
• API pagination.
• Performance.
• Secure credential management.
• Good architectural practices.

Practice: convert a basic workflow into a production-ready automation.

Unit 5. n8n in enterprise environments

• n8n Cloud vs self-hosted.
• Basic Docker concepts.
• Environment variables.
• User and project management.
• Credentials.
• Environment separation.
• Development, testing, and production.
• Backups.
• Security.
• Governance.
• Documentation.
• Versioning and maintenance.
• Introduction to Git and change control.

Final project: integration of a business process using API, webhook, error handling, and several external systems.