Generate newsletters: Slack + sub-workflow
Runs on a schedule across Slack, Google Sheets and PostgreSQL, summarises long text with an AI chain, then drops anything it has already handled. Built for blog posts, around a "Pull Fresh Items (API)" step, in 33 documented nodes.
Generate newsletters with PostgreSQL and Slack. An original, ready-to-import n8n workflow built around the 'Content Generation' pattern for content creation & media. It runs on a schedule and orchestrates 33 nodes across Slack, Google Sheets, HTTP / REST API. 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. Nothing slips through the cracks.
Key benefits
- ✓Keeps Slack and Google Sheets in step for blog posts, without anyone re-typing a row
- ✓Safe to re-run: records already in Slack or Google Sheets are skipped, across all 33 nodes of this blog-posts build
- ✓A failed Slack or Google Sheets call is retried rather than dropped, at any of the 33 nodes in this blog-posts build
- ✓Every blog-posts run leaves an audit row behind, alongside Slack
- ✓The blog-posts AI step is isolated from Slack, so models swap without touching the other 33 nodes
Use cases
- →Teams keeping Slack and Google Sheets aligned by hand for blog posts
- →Blog posts work where "Pull Fresh Items (API)" is still a manual step before Slack
- →Blog posts work that only reaches Slack on a schedule, when someone remembers to start it
Integrations
Workflow preview (33 nodes)
The template's actual node layout and connections. Node parameters and credential slots unlock with the download.
What's inside (33 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
Architect levelThe deepest tier - sub-workflow delegation, state snapshots, and full observability.
- •Chaining a writer pass and a separate critic pass for better output
- •Converting markdown to HTML for delivery
- •Moving data between Slack, PostgreSQL and Google Sheets in a single run
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, Google Sheets, HTTP / REST API, PostgreSQL). 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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