Overview

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This page should serve as a “one-stop-shop” where you are able to review information about the course and also see where you can explore further.

Recitations

Final Exam

The final exam will focus on your knowledge of n8n and your technical skills in building AI workflows. This is not designed to be a “gotcha” moment; if you attended and worked through the recitations, you should receive close to a full grade.

Needed Credentials

For this course and for the final exam, we will connect to several different sources outside of n8n. Make sure that you have these credentials set up in n8n:

• OpenAI
• Google Sheets
• Google Calendar
• Gmail
• Telegram

You can find instructions on how to get set up with these services here.

Topics by Recitation

Recitation 1

• System prompting
  • Changing the tone of an LLM
  • Providing instructions on using tools efficiently
• Use of the Basic LLM Chain and AI Agent nodes, along with tools
• n8n triggers
  • Trigger manually
  • On chat message
  • Telegram → On message
• Use of the Google Calendar tools

  Recitation 2

• Use of core n8n nodes, including If, Edit Fields (Set), Date & Time, and n8n forms
• Human-in-the-loop architecture
  • Routing with the If node
• RAG
• Using Google Sheets and Gmail with n8n
• Use of the Structured Output Parser

  Recitation 3

• Constructing sub-workflows to make custom tools
  • When Executed by Another Workflow trigger
• Human-in-the-loop architecture
  • Nodes that involve waiting for a response (Human in the loop → Telegram or Human in the loop → Respond to Chat)
  • The Merge node
• Hierarchical agent architecture

  Recitation 4

• Creating evaluation pipelines for your agents
  • Use of the nodes Set Outputs, Set Metrics, and Check if Evaluating and the evaluation trigger On new Evaluation event

    Recitation 5

• Connecting n8n to Lovable and other sources using a webhook

Beyond Recitations…

Since this is only a 5 week course, we are not able to cover all of n8n’s functionalities in-depth. Here are some useful nodes that you may want to consider, either for your project or for any use of n8n beyond this course.

Schedule Trigger

This allows you to run workflows at specific times, such as every day or every month. For example, you might want to have a summary of your calendar for the day each morning.

HTTP Request node

n8n has many built-in connections to other systems, such as Google products, OpenAI, Telegram, Slack, and much more. However, if n8n does not have this native connection or you want to do something that is more technical than the default options available to you, this node lets you receive and/or send information to almost any service that has a public endpoint, such as APIs from tools, custom company systems, and even simple URLs that return data.

Code node

Use this node to write custom JavaScript or Python. This gives you maximum control over your workflow, but it’s also one of the most complex tools; it co

Filter node

This lets us only keep items that meet a certain condition. For example, if we have a dataset of customers, what they order, and how much they paid, we could filter to only look at orders that are over $100.

Summarize node

Use summarize to group items together. There are many different ways to do so, including summing or averaging values and combining values (such as taking the strings “apple” and “orange” and concatenating them into “apple orange”).

Aggregate node

Aggregating lets us take multiple items of data and group them into a single item. This is useful to “package” your results and make them easier to reference in future steps. For example, let’s say that we just used the Summarize node to calculate the total expenses of a business in several different categories. Aggregate lets us process these subtotals into a single list, which actually makes it easier to reference each individual value if we want to send an email with these expense reports.

Useful Links and Resources

• n8n documentation: provides information on all of the nodes and triggers in n8n.
• n8n community: if you have a question, it’s possible that someone else has had it, too! This is a great place to troubleshoot.
• n8n templates: see what other people have built
• There are many content creators making great videos on n8n workflows. One excellent example is Nate Herk, but feel free to check out the (many) videos that exist on YouTube.