Automation library · Money admin

Intelligent invoice processing & notification agent

Started by an arriving email, and works across Gmail and Slack. It hands the judgement calls to OpenAI and OpenRouter. 19 steps, 3 branches: a working afternoon to understand properly.

MediumCalls a model: OpenAI, OpenRouter

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

The flow

Starts it 1Model 5Logic 5Service 8

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

  1. 1OpenRouter Chat ModelLm Chat Open RouterModel
  2. 2Gmail TriggerGmail triggerStarts it
  3. 3Basic LLM ChainChain LlmModel
  4. 4Basic LLM Chain1Chain LlmModel
  5. 5Fetch Invoice EmailsGmailService
  6. 6Post to Slack (text only)1SlackService
  7. 7Post to Slack (text only)SlackService
  8. 8Has Direct Attachment?IfLogic
  9. 9Mark As Read1GmailService
  10. 10Mark As ReadGmailService
  11. 11PDFco ApiPDFco ApiService
  12. 12Edit Fields1SetLogic
  13. 13PDFco Api2PDFco ApiService
  14. 14OpenAIOpen AiModel
  15. 15Update ParseCodeLogic
  16. 16IfIfLogic
  17. 17OpenAI1Open AiModel
  18. 18Mark As Read2GmailService
  19. 19If1IfLogic

How it's built

Starts on
An arriving email
Steps
19, with 3 branches
Size
Medium: a working afternoon
Connects to
Gmail, Slack
Model
OpenAI, OpenRouter

Questions

What does it need to run?

An n8n account, plus your own Gmail and Slack 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. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 19 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 19 steps before you point it at anything that matters.