Automation library · Setup and learning

Build an MCP server with Google Calendar

Started by someone opening a chat with it, and works across Google Calendar. It puts OpenAI behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 22 steps, 1 branch: large, and worth reading before you trust it with anything live.

LargeCalls a model: OpenAIRetrieval

Download free
22 stepsLarge: read it before trusting it with anything live
1Branch: places the flow splits
0Loops or waits
1Service it connects to

The flow

Starts it 4Model 8Logic 4Service 6

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

  1. 1SearchEventGoogle Calendar ToolService
  2. 2CreateEventGoogle Calendar ToolService
  3. 3UpdateEventGoogle Calendar ToolService
  4. 4DeleteEventGoogle Calendar ToolService
  5. 5When Executed by Another WorkflowExecute Workflow triggerStarts it
  6. 6Convert TextTool WorkflowModel
  7. 7When chat message receivedChat triggerStarts it
  8. 8Simple MemoryMemory Buffer WindowModel
  9. 9Calendar MCPMcp Client ToolModel
  10. 10My FunctionsMcp Client ToolModel
  11. 11Generate random user dataTool WorkflowModel
  12. 12Random JokesTool WorkflowModel
  13. 13OpenAI 4oLm Chat Open AiModel
  14. 14Google Calendar MCPMcp triggerStarts it
  15. 15SwitchSwitchLogic
  16. 16My Functions ServerMcp triggerStarts it
  17. 17AI AgentAgentModel
  18. 18Convert Text to Upper CaseSetLogic
  19. 19Convert Text to Lower CaseSetLogic
  20. 20Random user dataDebug HelperService
  21. 21Joke RequestHttp RequestService
  22. 22Return only some fieldsSetLogic

How it's built

Starts on
Someone opening a chat with it
Steps
22, with 1 branch
Size
Large: read it before trusting it with anything live
Connects to
Google Calendar
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 Google Calendar account, 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?

Take your time. At 22 steps it is large: read it before trusting it with anything live.

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 22 steps before you point it at anything that matters.