# Detect AWS cost spikes and open Terraform fix PRs with OpenAI: n8n workflow

> Started by a clock, and works across Slack. It hands the judgement calls to OpenAI. 18 steps, 1 branch, 1 loop or waits: a working afternoon to understand...

Source: https://millionrounds.com/workflow/detect-aws-cost-spikes-and-open-terraform-fix-prs-with-opena (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)

# Detect AWS cost spikes and open Terraform fix PRs with OpenAI

Started by a clock, and works across Slack. It hands the judgement calls to OpenAI. 18 steps, 1 branch, 1 loop or waits: a working afternoon to understand properly.

Medium Calls a model: OpenAI

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fdetect-aws-cost-spikes-and-open-terraform-fix-prs-with-opena)

**18 steps** Medium: a working afternoon

**1** Branch: places the flow splits

**1** Loop or waits

**1** Service it connects to

## The flow

Starts it 2 Model 2 Logic 6 Service 8

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

- 1 **Schedule Trigger - Every 6 Hours** Schedule trigger *Starts it*
- 2 **Manual Trigger - Test Run** Manual trigger *Starts it*
- 3 **OpenAI Chat Model** Lm Chat Open Ai *Model*
- 4 **Set - Config** Set *Logic*
- 5 **AI - Generate Root Cause Analysis & Terraform Fix** Agent *Model*
- 6 **HTTP Request - Fetch AWS Cost & Usage** Http Request *Service*
- 7 **JS - Parse AI Fix Output & Build Payloads** Code *Logic*
- 8 **JS - Parse Cost Data & Detect Spike** Code *Logic*
- 9 **HTTP Request - Get Base Branch Ref** Http Request *Service*
- 10 **IF - Cost Spike Detected** If *Logic*
- 11 **HTTP Request - Create Branch** Http Request *Service*
- 12 **HTTP Request - List Terraform Commits** Http Request *Service*
- 13 **Wait For Result** Wait *Logic*
- 14 **JS - Identify Root-Cause Commit** Code *Logic*
- 15 **HTTP Request - Update Terraform File on Branch** Http Request *Service*
- 16 **HTTP Request - Get Current Terraform File** Http Request *Service*
- 17 **HTTP Request - Create Pull Request** Http Request *Service*
- 18 **Slack - Notify Team** Slack *Service*

## How it's built

- **Starts on:** A clock
- **Steps:** 18, with 1 branch, 1 loop or waits
- **Size:** Medium: a working afternoon
- **Connects to:** Slack
- **Model:** OpenAI

## Questions

What does it need to run?

An n8n account, plus your own Slack account, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on a clock.

Does it use AI?

Yes. It calls OpenAI. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 18 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 18 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%2Fdetect-aws-cost-spikes-and-open-terraform-fix-prs-with-opena)
- **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.

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

## Workflows like it

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

- [**AI Event Feedback Analyzer with Google Forms and OpenAI** 18 steps · calls a model · Google Docs, Google Sheets](https://millionrounds.com/workflow/ai-event-feedback-analyzer-with-google-forms-and-openai)
- [**Detect missing alcohol test records with Gemini and Gmail** 18 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/detect-missing-alcohol-test-records-with-gemini-and-gmail)
- [**Generate Seedance AI lighting look dev variations with Drive** 18 steps · calls a model · Google Drive, Notion](https://millionrounds.com/workflow/generate-seedance-ai-lighting-look-dev-variations-with-drive)
- [**Generate multi-channel release notes from ClickUp tasks** 18 steps · calls a model · ClickUp, Gmail](https://millionrounds.com/workflow/generate-multi-channel-release-notes-from-clickup-tasks)
- [**Optimize maritime routes and disruption response with OpenAI** 18 steps · calls a model · Slack](https://millionrounds.com/workflow/optimize-maritime-routes-and-disruption-response-with-openai)
- [**Provision client onboarding workspaces with ClickUp and Slack** 18 steps · calls a model · ClickUp, Gmail](https://millionrounds.com/workflow/provision-client-onboarding-workspaces-with-clickup-and-slac)