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WorkflowCrate
AdvancedPremiumContent GenerationScheduled trigger23 nodes

Draft newsletters with PostgreSQL

Runs on a schedule across PostgreSQL, Slack and Google Sheets, summarises long text with an AI chain, then drops anything it has already handled. Built for newsletters, around a "Pull Fresh Items (API)" step, in 23 documented nodes.

Draft newsletters with PostgreSQL and Slack automatically. 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 PostgreSQL, Slack, Google Sheets. 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. Your team sees the right data at the right time.

Key benefits

  • ✓Keeps PostgreSQL and Slack in step for newsletters, without anyone re-typing a row
  • ✓Safe to re-run: records already in PostgreSQL or Slack are skipped, across all 23 nodes of this newsletters build
  • ✓A failed PostgreSQL or Slack call is retried rather than dropped, at any of the 23 nodes in this newsletters build
  • ✓Every newsletters run leaves an audit row behind, alongside PostgreSQL
  • ✓The newsletters AI step is isolated from PostgreSQL, so models swap without touching the other 23 nodes

Use cases

  • →Teams keeping PostgreSQL and Slack aligned by hand for newsletters
  • →Newsletters work where "Pull Fresh Items (API)" is still a manual step before PostgreSQL
  • →Newsletters work that only reaches PostgreSQL on a schedule, when someone remembers to start it

Integrations

PostgreSQLSlackGoogle SheetsHTTP / REST APIGroq

Workflow preview (23 nodes)

The template's actual node layout and connections. Node parameters and credential slots unlock with the download.

Daily ScheduleSchedule TriggerPull Fresh Items (API)Http RequestNewest FirstSortTrim to Digest SizeLimitSummarize Content (AI)Chain SummarizationGroq Chat ModelLm Chat GroqRender as HTMLMarkdownPost Digest to SlackSlackArchive Digest in Postg…PostgresStamp Completion TimeDate TimePersist Run MetadataExecution DataSerialize Run Output (C…Convert To FileArchive Row SnapshotPostgresFingerprint for Idempot…CodeDrop Already-Processed …Remove DuplicatesLoad Previous SnapshotPostgresCompute Drift vs Snapsh…CodeSummarize Run StatsSetAppend Audit Row (Postg…PostgresSend Summary to SlackSlackCapture Failure ContextSetEscalate Failure to Sla…SlackPark in Dead-Letter Que…Google Sheets

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.

Chain SummarizationCodeConvert To FileDate TimeExecution DataGoogle SheetsHttp RequestLimitLm Chat GroqMarkdownPostgresRemove DuplicatesSchedule TriggerSetSlackSort

From download to running in 3 steps

  1. 1
    Import. In n8n, open Workflows → menu → “Import from File” and pick the downloaded JSON.
  2. 2
    Connect. Add your own credentials on the app nodes - n8n highlights exactly which ones need them.
  3. 3
    Activate. Run it once to test, then toggle Active. The automation is live.

What you'll learn

Production level

Production-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 (PostgreSQL, Slack, Google Sheets, HTTP / REST API). 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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Original n8n workflow template created and owned by WorkflowCrate. After purchase you receive the ready-to-import JSON file and a license to use and adapt it in your own projects.