Automation library · Scheduling

Build your first AI agent with OpenAI

Started by someone opening a chat with it, and works across Gmail, Google Calendar and Google Sheets. It puts OpenAI behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 9 steps: a working afternoon to understand properly.

MediumCalls a model: OpenAIRetrieval

9 stepsMedium: a working afternoon
0Branches: places the flow splits
0Loops or waits
3Services it connects to

The flow

Starts it 1Model 4Service 4

The steps in the order they run, from what starts it.

  1. 1Chat with Your DataChat triggerStarts it
  2. 2Reasoning Tool (LangChain)Tool ThinkModel
  3. 3OpenAI GPT-5 ModelLm Chat Open AiModel
  4. 4Knowledgebase LookupGoogle Sheets ToolService
  5. 5Calendar: Check AvailabilityGoogle Calendar ToolService
  6. 6Calendar: Create AppointmentGoogle Calendar ToolService
  7. 7Send Booking ConfirmationGmail ToolService
  8. 8MemoryMemory Buffer WindowModel
  9. 9AI Agent SupportAgentModel

How it's built

Starts on
Someone opening a chat with it
Steps
9
Size
Medium: a working afternoon
Connects to
Gmail, Google Calendar, Google Sheets
Model
OpenAI
Retrieval
Answers are drawn from documents you supply, not from the model alone

Questions

What does it need to run?

An n8n account, plus your own Gmail, Google Calendar and Google Sheets accounts, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on someone opening a chat with it.

Does it use AI?

Yes. It calls OpenAI. Its answers draw on documents you give it, not on the model alone. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 9 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

Before you run it

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 9 steps before you point it at anything that matters.