Retrieve questions from a knowledge base: Slack & Google Sheets
Fires the moment a webhook arrives across Slack and Google Sheets, hands the decision to an AI agent with its own tools, then branches on the check before anything is written. Built for q&a, around a "Keep Valid Documents" step, in 21 documented nodes.
Retrieve questions from a knowledge base with HTTP / REST API without manual work for Q&A. An original, ready-to-import n8n workflow built around the 'RAG Pipeline' pattern for AI & automation. It fires on a webhook and orchestrates 21 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 q&a, without anyone re-typing a row
- ✓A failed Slack or Google Sheets call is retried rather than dropped, at any of the 21 nodes in this q&a build
- ✓Branches rejoin before Slack, so a q&a run reports once rather than 21 times
- ✓Every q&a run leaves an audit row behind, alongside Slack
- ✓The q&a AI step is isolated from Slack, so models swap without touching the other 21 nodes
Use cases
- →Teams keeping Slack and Google Sheets aligned by hand for q&a
- →Q&a work that needs a judgement call per item before it reaches Slack
- →Pushing q&a events into Slack and Google Sheets the moment they land, not on the next poll
- →Q&a work where "Keep Valid Documents" is still a manual step before Slack
Integrations
Workflow preview (21 nodes)
The template's actual node layout and connections. Node parameters and credential slots unlock with the download.
What's inside (21 nodes)
A look at the node types this workflow uses. No purchase required — full parameters and credentials are yours after you buy.
Agent tools included (3)
An AI Agent is only as capable as the tools wired into it. These are read from the template's own graph — every one is a real node in the file you download.
- Custom Logic Tool · Custom code
- Lookup API Data · HTTP request
- Search Reference Wiki · Wikipedia
Conversation memory is attached, so the agent carries earlier turns of a session.
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.
- •Moving data between Google Sheets and Slack in a single run
- •Splitting one run into branches and merging the results back
- •Normalising timestamps before anything downstream compares them
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). 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
Answer questions from a knowledge base: Google Sheets + sub-workflow
Q&a on n8n: runs when a webhook arrives across Google Sheets, Slack and Notion, starting at "List Changed Docs (Google Sheets)". Looks the answer up in a vector store. 31 documented nodes.
Retrieve questions from a knowledge base: Google Sheets
Q&a on n8n: runs when a webhook arrives across Google Sheets and Slack, starting at "Keep Valid Documents". Hands the decision to an AI agent with its own tools. 22 documented nodes.
Distill long emails: Google Sheets & Slack for q&a
Q&a on n8n: runs when a webhook arrives across Google Sheets, Slack, Notion and Microsoft Teams, starting at "Reason & Act (AI Agent)". 33 documented nodes.
Summarize meeting notes: MySQL for q&a
Q&a on n8n: runs when a webhook arrives across MySQL, Telegram, Google Sheets and Slack, starting at "Read Recent from MySQL". Summarises long text with an AI chain. 23 documented nodes.