Automation library · Chat assistants

Draft Gmail replies with OpenAI and OpenRouter

Started by an arriving email, and works across Gmail, Supabase vectors and Telegram. It puts OpenAI and OpenRouter behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 15 steps, 1 branch: a working afternoon to understand properly.

MediumCalls a model: OpenAI, OpenRouterRetrieval

15 stepsMedium: a working afternoon
1Branch: places the flow splits
0Loops or waits
3Services it connects to

The flow

Starts it 1Model 9Logic 2Service 3

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

  1. 1Gmail TriggerGmail triggerStarts it
  2. 2OpenAI Chat ModelLm Chat Open AiModel
  3. 3OpenAI Chat Model1Lm Chat Open AiModel
  4. 4Embeddings OpenAIEmbeddings Open AiModel
  5. 5createDraftGmail ToolService
  6. 6OpenRouter Chat ModelLm Chat Open RouterModel
  7. 7Structured Output ParserOutput Parser StructuredModel
  8. 8Set ContentSetLogic
  9. 9Email Draft AgentAgentModel
  10. 10Vector Store ToolTool Vector StoreModel
  11. 11Vector StorageVector Store SupabaseModel
  12. 12Client/Prospect Related?Chain LlmModel
  13. 13ResponseTelegramService
  14. 14Customer Support?SwitchLogic
  15. 15Response Not Customer SupportTelegramService

How it's built

Starts on
An arriving email
Steps
15, with 1 branch
Size
Medium: a working afternoon
Connects to
Gmail, Supabase vectors, Telegram
Model
OpenAI, 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 Gmail, Supabase vectors and Telegram accounts, and a key for OpenAI and OpenRouter. You connect your own accounts after importing it; none are included.

What starts it?

It starts on an arriving email.

Does it use AI?

Yes. It calls OpenAI and 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. 15 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 15 steps before you point it at anything that matters.