# Verify customs shipping documents with OpenAI and Gmail: n8n workflow

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

Source: https://millionrounds.com/workflow/verify-customs-shipping-documents-with-openai-and-gmail (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Documents and files](https://millionrounds.com/workflows?category=Documents+and+files#library)

# Verify customs shipping documents with OpenAI and Gmail

Started by another system calling it, and works across Gmail and Slack. It hands the judgement calls to OpenAI. 10 steps, 1 branch: a working afternoon to understand properly.

Medium Calls a model: OpenAI

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fverify-customs-shipping-documents-with-openai-and-gmail)

**10 steps** Medium: a working afternoon

**1** Branch: places the flow splits

**0** Loops or waits

**2** Services it connects to

## The flow

Starts it 2 Model 1 Logic 3 Service 4

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

- 1 **📡 Webhook, Receive Documents** Webhook *Starts it*
- 2 **On Workflow Error** Error trigger *Starts it*
- 3 **Map Incoming Webhook Fields** Set *Logic*
- 4 **Slack, Send Workflow Error Alert** Slack *Service*
- 5 **Extract Bill of Lading Fields via GPT** Open Ai *Model*
- 6 **Cross-Check All Document Fields** Code *Logic*
- 7 **Slack, Alert on AI Extraction Failure** Slack *Service*
- 8 **Check Verdict, Ready to File?** If *Logic*
- 9 **Gmail, Send Ready to File Report** Gmail *Service*
- 10 **Gmail, Send Needs Correction Report** Gmail *Service*

## How it's built

- **Starts on:** Another system calling it
- **Steps:** 10, with 1 branch
- **Size:** Medium: a working afternoon
- **Connects to:** Gmail, Slack
- **Model:** OpenAI

## Questions

What does it need to run?

An n8n account, plus your own Gmail and Slack accounts, and a key for OpenAI. 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 OpenAI. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 10 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 10 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%2Fverify-customs-shipping-documents-with-openai-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)[Slack](https://millionrounds.com/workflows?service=Slack#library)

## Workflows like it

Also documents and files, with the same services where possible, closest in size first.

- [**Parse CVs from emails with OCR and OpenAI** 10 steps · calls a model · Gmail, Notion](https://millionrounds.com/workflow/parse-cvs-from-emails-with-ocr-and-openai)
- [**Rename Gmail attachments with OpenAI** 10 steps · calls a model · Gmail, Google Drive](https://millionrounds.com/workflow/rename-gmail-attachments-with-openai)
- [**Auto-generate and auto-fill business documents** 10 steps · Gmail, Google Drive](https://millionrounds.com/workflow/auto-generate-and-auto-fill-business-documents)
- [**Backup workflow & credentials to Cloudflare R2 with S3** 10 steps · S3, Slack](https://millionrounds.com/workflow/backup-workflow-and-credentials-to-cloudflare-r2-with-s3)
- [**Detect duplicate Google Drive files and log results** 10 steps · Gmail, Google Drive](https://millionrounds.com/workflow/detect-duplicate-google-drive-files-and-log-results)
- [**Generate PDF documents from HTML with PDF Generator API** 10 steps · Gmail, Postgres](https://millionrounds.com/workflow/generate-pdf-documents-from-html-with-pdf-generator-api)