Auto-Write a personalized welcome with AI the Moment a new forum thread is created and Post It to Slack
Every time a new forum thread is created, this workflow hands it to Claude, which writes a warm, personalized welcome message. You get every new member greeted personally without lifting a finger.
- 1
Trigger when a new forum thread is created
A
Webhook Triggerstarts the workflow the moment a new forum thread is created. - 2
Hand it to the AI agent
An
AI Agentnode running Claude writes a warm, personalized welcome message. The prompt is pre-written and scoped to this one job so results stay consistent. - 3
Deliver the welcome
The result is sent to Slack — with the original for context.
- 4
Add a safety net (optional)
Insert an
IF/human-approval step before anything is published or emailed, so you stay in control until you trust the output.
Frequently asked questions
How much does the AI part cost to run?
Pennies. Each run sends a small amount of text to the model, so most teams spend a few dollars a month even at hundreds of runs. You set the model and can cap volume in n8n, so costs never surprise you.
Can I trust the AI to get the welcome right?
The prompt is tightly scoped to one job and you can add a human-approval step in n8n before anything is sent or published. Start with review-mode for a week, and once you trust the output, switch it to fully automatic.
Does this need n8n Cloud or can I self-host?
Either works. The workflow is a standard n8n export, so you can run it on n8n Cloud or on your own self-hosted instance — you only connect your own app credentials.
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