Reconcile transactions with Slack
Watches an inbox across Slack, PostgreSQL and Gmail, pulls structured fields out of free text, then branches on the check before anything is written. Built for invoicing, around a "Collect Raw Text" step, in 17 documented nodes.
Reconcile transactions with PostgreSQL and Gmail on autopilot. An original, ready-to-import n8n workflow built around the 'Expense Tracking' pattern for finance & banking. It triggers on new email and orchestrates 17 nodes across Slack, PostgreSQL, Gmail. It uses n8n's LangChain AI nodes (Agent/Chain + chat model). Retry-on-fail is enabled on external calls. Import the JSON, add your credentials, and adapt the parameters. What used to take a morning now runs on its own.
Key benefits
- ✓Keeps Slack and PostgreSQL in step for invoicing, without anyone re-typing a row
- ✓A failed Slack or PostgreSQL call is retried rather than dropped, at any of the 17 nodes in this invoicing build
- ✓Branches rejoin before Slack, so a invoicing run reports once rather than 17 times
- ✓Fans the same result out to Gmail in the same run, for invoicing
- ✓Pinned sample data ships with it — run all 17 nodes for invoicing before wiring Slack
Use cases
- →Teams keeping Slack and PostgreSQL aligned by hand for invoicing
- →Invoicing work where "Collect Raw Text" is still a manual step before Slack
- →Invoicing work that only reaches Slack when mail lands in the inbox, when someone remembers to start it
Integrations
Workflow preview (17 nodes)
The template's actual node layout and connections. Node parameters and credential slots unlock with the download.
What's inside (17 nodes)
A look at the node types this workflow uses. No purchase required — full parameters and credentials are yours after you buy.
From download to running in 3 steps
- 1Import. In n8n, open Workflows → menu → “Import from File” and pick the downloaded JSON.
- 2Connect. Add your own credentials on the app nodes - n8n highlights exactly which ones need them.
- 3Activate. Run it once to test, then toggle Active. The automation is live.
What you'll learn
Advanced levelAdds branching depth and audit logging on top of the core pattern.
- •Extracting totals and vendors from receipts
- •Validating before writing to the ledger
- •Flagging anomalies for review
Every node carries its own documentation on the canvas, plus notes explaining why the architecture was built this way, a credential setup guide, troubleshooting, and three practice exercises. Sample data comes pinned to the trigger, so you can hit Execute and watch data flow before connecting a single account.
Common questions
What exactly do I get?
The complete, ready-to-import n8n workflow as a JSON file, delivered instantly after payment. Import it into your own n8n (cloud or self-hosted), add your credentials, and it runs.
How do I import it into n8n?
In n8n, open Workflows, click the three-dot menu, choose “Import from File”, and select the downloaded JSON. Then connect your own app credentials on the highlighted nodes.
Do I need anything else for it to work?
You need your own n8n instance and accounts/credentials for the apps this workflow connects to (Slack, PostgreSQL, Gmail). No coding is required.
What if it doesn't work for me?
If the file is faulty, won't import, or isn't as described, contact us within 7 days and we'll fix it or refund you - see our refund policy.
Can I modify or resell it?
You can freely adapt and use it in your own or your clients' projects. Reselling or redistributing the template file itself is not permitted.
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