Produce newsletters: Slack, scheduled
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 captions, around a "Pull Fresh Items (API)" step, in 23 documented nodes.
Produce newsletters with PostgreSQL and Slack 24/7. An original, ready-to-import n8n workflow built around the 'Content Generation' pattern for content creation & media. It runs on a schedule and orchestrates 23 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. What used to take a morning now runs on its own.
Key benefits
- ✓Keeps Slack and Google Sheets in step for captions, without anyone re-typing a row
- ✓Safe to re-run: records already in Slack or Google Sheets are skipped, across all 23 nodes of this captions build
- ✓A failed Slack or Google Sheets call is retried rather than dropped, at any of the 23 nodes in this captions build
- ✓The captions AI step is isolated from Slack, so models swap without touching the other 23 nodes
- ✓Fans the same result out to PostgreSQL in the same run, for captions
Use cases
- →Teams keeping Slack and Google Sheets aligned by hand for captions
- →Captions work where "Pull Fresh Items (API)" is still a manual step before Slack
- →Captions work that only reaches Slack on a schedule, when someone remembers to start it
Integrations
Workflow preview (23 nodes)
The template's actual node layout and connections. Node parameters and credential slots unlock with the download.
What's inside (23 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
Production levelProduction-grade: idempotency, dead-letter handling, and reconciliation included.
- •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.
Related templates
Publish the content calendar: Slack for captions, scheduled
Captions on n8n: runs on a schedule across Slack, Google Sheets and PostgreSQL, starting at "Stamp & Shape Draft". Pauses on a Wait node until it is time to continue. 23 documented nodes.
Auto-post social posts: Slack for captions, scheduled
Captions on n8n: runs on a schedule across Slack, PostgreSQL and Google Sheets, starting at "Read Content Calendar (PostgreSQL)". Walks the list in batches, pausing between them. 22 documented nodes.
Digest meeting notes: Google Sheets for captions
Captions on n8n: runs when a webhook arrives across Google Sheets, Notion, Twilio, Slack and PostgreSQL, starting at "Collect Raw Text". Pulls structured fields out of free text. 31 documented nodes.
Schedule the content calendar: PostgreSQL
Captions on n8n: runs on a schedule across PostgreSQL, Slack and Google Sheets, starting at "Read Source Feed". Runs the text through an AI chain. 22 documented nodes.