Control AI agent tool access with Port RBAC and Slack mentions
Needs changesNeeds changes. This template uses 2 thing(s) that n8n 3.0 removes: LangChain Code (legacy), AI Agent v1 (old agent modes). 2 breaking item(s) found. Static check, last run 2026-10-19.
What this workflow does
This AI workflow has 17 nodes and runs on Slack events. Along the way it connects OpenAI Chat Model, Slack, Wikipedia and PagerDuty and 1 more. It also calls api.port.io over HTTP.
How it runs
Trigger: On Slack events.
- Get user's slack profile (Slack): get profile (user)
- Get Port access token (HTTP Request): calls api.port.io (POST)
- Get Regions from Port (HTTP Request): calls api.port.io
- Get user permission from Port (HTTP Request): calls an HTTP API
- Unknown user (If): checks a condition and branches into true / false
- Send a message (Slack): uses Slack
- Set input (Edit Fields (Set)): sets 4 fields: name, granted_roles, allowed_tools…
- AI Agent: runs an AI agent, with model: OpenAI Chat Model; 1 tool (Check permissions); memory: Chat Memory
- Send output message (Slack): uses Slack
Services it uses
HTTP calls to: api.port.io
Before you upgrade to n8n 3.0
2 things in this workflow are removed in n8n 3.0. Fix them before you upgrade:
- LangChain Code (legacy) in Check permissions: no direct replacement.
- AI Agent v1 (old agent modes) in AI Agent (v1.8): replace with Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent.
- Also check Slack Trigger requires a signing secret on the Slack API credential.
Rather not rewrite it? Many of these flows can be rebuilt in Make (free plan).
| Removed in 3.0 | Replace with |
|---|---|
| LangChain Code (legacy) Check permissions | No direct replacement |
| AI Agent v1 (old agent modes) AI Agent (v1.8) | Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent. |
Rarely used nodes in this template: n8n-nodes-base.pagerDutyTool, n8n-nodes-base.awsS3Tool
Nodes used (13)
- OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi - LangChain Code
@n8n/n8n-nodes-langchain.code - Edit Fields (Set)
n8n-nodes-base.set - Calculator
@n8n/n8n-nodes-langchain.toolCalculator - If
n8n-nodes-base.if - Slack Trigger
n8n-nodes-base.slackTrigger - Slack
n8n-nodes-base.slack - HTTP Request
n8n-nodes-base.httpRequest - Wikipedia
@n8n/n8n-nodes-langchain.toolWikipedia - Pager Duty Tool
n8n-nodes-base.pagerDutyTool - Aws S3Tool
n8n-nodes-base.awsS3Tool - Simple Memory
@n8n/n8n-nodes-langchain.memoryBufferWindow - AI Agent
@n8n/n8n-nodes-langchain.agent
From the author
RBAC for AI agents with n8n and Port This workflow implements role-based access control for AI agent tools using Port as the single source of truth for permissions. Different users get access to different tools based on their roles, without needing a separate…