Track SaaS spend from email invoices with AgentMail, JigsawStack and Postgres

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1. Workflow Overview

WHAT you need 1. Jigsaw API key for image processing, I use this as a gatekeeper/second pair of eyes. 3. LINK to their website https://jigsawstack.com/ 6. SECOND A postgress DATABASE (I use [Supaba...

Best for

Invoice Processing automation workflows
AI Summarization automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.httprequest, n8n-nodes-base.switch, n8n-nodes-base.postgres, n8n-nodes-base.webhook, n8n-nodes-base.code, n8n-nodes-base.if, n8n-nodes-base.executeworkflow

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Stephan Koning.

Original n8n.io source

1.1 Workflow description

Title: Track SaaS spend from email invoices with AgentMail, JigsawStack and Postgres
Workflow name: Track SaaS spend from email invoices with AgentMail, JigsawStack and Postgres

WHAT you need

Jigsaw API key for image processing, I use this as a gatekeeper/second pair of eyes.
LINK to their website https://jigsawstack.com/
SECOND A postgress DATABASE (I use Supabase)
LlamaCloud for the parsing (you can replace this with Jigsaw if you like)
Redis (Optional , but I would strongly advise using it)
agentMail , this is your trigger email adress and BOX
Webhook Trigger (Svix or n8n's builtin webhook)

WHAT is it?

This is an easy way to track your SaaS spending, especially for small business owners or solopreneurs. It's essentially exactly what tools like Spendbase and Ramp do, without the virtual card.

HOW it works

After getting your API keys, all you need to do is set up an AgentMail inbox for your invoices. This is your trigger.

In the current setup, the workflow will only trigger if you send an attachment.

You can find more information on how to use the workflow in the workflow notes.

The database schema

You can find it as a deactivated code node in the workflow.

Free 15 min Onboarding Coffee

If you want I can walk you through the setup and you will have it up and running in no time. Free onboarding chat

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 2 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 3 - Sticky Note2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 4 - Sticky Note3

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 5 - Sticky Note4

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 6 - Sticky Note5

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 7 - Sticky Note6

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 8 - Sticky Note7

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 9 - Post to JigsawStack API

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.4

Block 10 - Route by Invoice Type

Type / Role: n8n-nodes-base.switch - switch
Config choices: Version 3.4

Block 11 - Upsert Invoice Record

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2.6

Block 12 - AgentMail Webhook Trigger

Type / Role: n8n-nodes-base.webhook - webhook
Config choices: Version 2

Block 13 - Fetch Download URL

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 14 - Acquire Pipeline Job

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2.6

Block 15 - Parse Acquire Result

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 16 - If Job Acquired

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.2

Block 17 - Prepare Skipped Log

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 18 - Log Skipped Event

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2.6

Block 19 - Handle SQL Error Details

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 20 - Extract Attachment Payload

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 21 - Prepare Complete Job

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 22 - Complete Pipeline Job

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2.6

Block 23 - Prepare Success Log

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 24 - Log Success Event

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2.6

Showing the first 24 of 72 workflow blocks. Download the JSON for the full node graph.

3. Summary Table

Workflow	Track SaaS spend from email invoices with AgentMail, JigsawStack and Postgres
Complexity	advanced
Nodes	72
Categories	Invoice Processing, AI Summarization
Author	Stephan Koning
Published	12 Apr 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/14997/14997.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Invoice Processing workflows AI Summarization workflows

Frequently asked questions

What does Track SaaS spend from email invoices with AgentMail, JigsawStack and Postgres do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Invoice Processing, AI Summarization use case.

Stephan Koning

15 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.httprequest n8n-nodes-base.switch n8n-nodes-base.postgres n8n-nodes-base.webhook n8n-nodes-base.code n8n-nodes-base.if n8n-nodes-base.executeworkflow

Complexity

advanced

Published 12 Apr 2026

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/14997/14997.json

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Track SaaS spend from email invoices with AgentMail, JigsawStack and Postgres

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

WHAT you need

WHAT is it?

HOW it works

The database schema

Free 15 min Onboarding Coffee

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Sticky Note

Block 2 - Sticky Note1

Block 3 - Sticky Note2

Block 4 - Sticky Note3

Block 5 - Sticky Note4

Block 6 - Sticky Note5

Block 7 - Sticky Note6

Block 8 - Sticky Note7

Block 9 - Post to JigsawStack API

Block 10 - Route by Invoice Type

Block 11 - Upsert Invoice Record

Block 12 - AgentMail Webhook Trigger

Block 13 - Fetch Download URL

Block 14 - Acquire Pipeline Job

Block 15 - Parse Acquire Result

Block 16 - If Job Acquired

Block 17 - Prepare Skipped Log

Block 18 - Log Skipped Event

Block 19 - Handle SQL Error Details

Block 20 - Extract Attachment Payload

Block 21 - Prepare Complete Job

Block 22 - Complete Pipeline Job

Block 23 - Prepare Success Log

Block 24 - Log Success Event

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions