Automation library · E-commerce

AI-powered food order processing with Facebook Messenger

Started by another system calling it, and works across Google Calendar and Google Sheets. It puts OpenRouter behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 17 steps, 3 branches: a working afternoon to understand properly.

MediumCalls a model: OpenRouterRetrieval

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17 stepsMedium: a working afternoon
3Branches: places the flow splits
0Loops or waits
2Services it connects to

The flow

Starts it 5Model 3Logic 4Service 5

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

  1. 1Memory Buffer (Customer Session)Memory Buffer WindowModel
  2. 2OpenRouter ModelLm Chat Open RouterModel
  3. 3Webhook - FB MessengerWebhookStarts it
  4. 4AI Agent (Order Assistant)AgentModel
  5. 5Validate Webhook SubscriptionIfLogic
  6. 6Respond 200 OKRespond To WebhookStarts it
  7. 7Respond ChallengeRespond To WebhookStarts it
  8. 8Respond 202 (Error fallback)Respond To WebhookStarts it
  9. 9Send Message to FB (Text)Http RequestService
  10. 10Send Message to FB (Image)Http RequestService
  11. 11Check for Menu TriggerIfLogic
  12. 12Send Generic Text (HTTP)Http RequestService
  13. 13Parse Order TextCodeLogic
  14. 14Validate Parsed OrderIfLogic
  15. 15Respond Raw Items (Debug)Respond To WebhookStarts it
  16. 16Create Calendar EventGoogle CalendarService
  17. 17Append or Update Orders SheetGoogle SheetsService

How it's built

Starts on
Another system calling it
Steps
17, with 3 branches
Size
Medium: a working afternoon
Connects to
Google Calendar, Google Sheets
Model
OpenRouter
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 and Google Sheets accounts, and a key for OpenRouter. You connect your own accounts after importing it; none are included.

What starts it?

It starts on another system calling it.

Does it use AI?

Yes. It calls OpenRouter. 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. 17 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 17 steps before you point it at anything that matters.