# Classify purchase requisitions with Gemini and Gmail: n8n workflow

> Started by another system calling it, and works across Gmail, Google Sheets and Slack. It hands the judgement calls to Gemini.

Source: https://millionrounds.com/workflow/classify-purchase-requisitions-with-gemini-and-gmail (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Chat assistants](https://millionrounds.com/workflows?category=Chat+assistants#library)

# Classify purchase requisitions with Gemini and Gmail

Started by another system calling it, and works across Gmail, Google Sheets and Slack. It hands the judgement calls to Gemini. 15 steps, 1 branch: a working afternoon to understand properly.

Medium Calls a model: Gemini

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fclassify-purchase-requisitions-with-gemini-and-gmail)

**15 steps** Medium: a working afternoon

**1** Branch: places the flow splits

**0** Loops or waits

**3** Services it connects to

## The flow

Starts it 1 Model 2 Logic 8 Service 4

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

- 1 **Trigger: New PR Submitted** Webhook *Starts it*
- 2 **Google Gemini Chat Model** Lm Chat Google Gemini *Model*
- 3 **Validate & Normalize PR Data** Code *Logic*
- 4 **AI: Categorize Purchase Requisition** Chain Llm *Model*
- 5 **Merge PR Data With AI Result** Merge *Logic*
- 6 **Parse AI Classification Result** Code *Logic*
- 7 **Store Procurement Record** Google Sheets *Service*
- 8 **Calculate Classification Confidence** Code *Logic*
- 9 **Notify Procurement Approver** Gmail *Service*
- 10 **Send Procurement Slack Alert** Slack *Service*
- 11 **Check Auto Approval Eligibility** If *Logic*
- 12 **Set Final Procurement Category** Set *Logic*
- 13 **Set Manual Review Status** Set *Logic*
- 14 **Merge Procurement Outcomes** Merge *Logic*
- 15 **Create Manual Review Ticket** Gmail *Service*

## How it's built

- **Starts on:** Another system calling it
- **Steps:** 15, with 1 branch
- **Size:** Medium: a working afternoon
- **Connects to:** Gmail, Google Sheets, Slack
- **Model:** Gemini

## Questions

What does it need to run?

An n8n account, plus your own Gmail, Google Sheets and Slack accounts, and a key for Gemini. 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 Gemini. 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.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fclassify-purchase-requisitions-with-gemini-and-gmail)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Connects to

Each opens the other workflows that use it.

[Gmail](https://millionrounds.com/workflows?service=Gmail#library)[Google Sheets](https://millionrounds.com/workflows?service=Google+Sheets#library)[Slack](https://millionrounds.com/workflows?service=Slack#library)

## Workflows like it

Also chat assistants, with the same services where possible, closest in size first.

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- [**Automate Client Onboarding with Asana and Slack** 15 steps · calls a model · Asana, Gmail](https://millionrounds.com/workflow/automate-client-onboarding-with-asana-and-slack)
- [**Automate email responses with OpenAI and Telegram** 15 steps · calls a model · Gmail, Telegram](https://millionrounds.com/workflow/automate-email-responses-with-openai-and-telegram)
- [**Check Japanese ad copy compliance with Gemini and Sheets** 15 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/check-japanese-ad-copy-compliance-with-gemini-and-sheets)
- [**Classify Gmail intents with Gemini and Slack** 15 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/classify-gmail-intents-with-gemini-and-slack)