Build an MCP server with Google Calendar and custom functions
Needs changesNeeds changes. This template uses 1 thing(s) that n8n 3.0 removes: AI Agent v1 (old agent modes). 1 breaking item(s) found. Static check, last run 2026-10-19.
What this workflow does
This AI workflow has 22 nodes and runs when a chat message arrives (plus 3 other triggers). Along the way it connects Google Calendar, MCP Client, DebugHelper and OpenAI Chat Model.
How it runs
Trigger: When a chat message arrives (plus 3 other triggers).
- AI Agent: runs an AI agent, with model: OpenAI 4o; 2 tools (Calendar MCP, My Functions); memory: Simple Memory
- Switch: routes items into 4 branches
- Convert Text to Upper Case (Edit Fields (Set)): sets 1 field: converted_text
- Convert Text to Lower Case (Edit Fields (Set)): sets 1 field: converted_text
- Random user data (DebugHelper): uses DebugHelper
- Joke Request (HTTP Request): calls an HTTP API
- Return only some fields (Edit Fields (Set)): sets 3 fields: First name, Last name, Email
Services it uses
Before you upgrade to n8n 3.0
1 thing in this workflow is removed in n8n 3.0. Fix it before you upgrade:
- 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.
| Removed in 3.0 | Replace with |
|---|---|
| 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. |
Nodes used (13)
- AI Agent
@n8n/n8n-nodes-langchain.agent - Google Calendar Tool
n8n-nodes-base.googleCalendarTool - MCP Server Trigger
@n8n/n8n-nodes-langchain.mcpTrigger - Execute Workflow Trigger
n8n-nodes-base.executeWorkflowTrigger - Switch
n8n-nodes-base.switch - Edit Fields (Set)
n8n-nodes-base.set - Call n8n Workflow Tool
@n8n/n8n-nodes-langchain.toolWorkflow - Chat Trigger
@n8n/n8n-nodes-langchain.chatTrigger - Simple Memory
@n8n/n8n-nodes-langchain.memoryBufferWindow - MCP Client Tool
@n8n/n8n-nodes-langchain.mcpClientTool - DebugHelper
n8n-nodes-base.debugHelper - HTTP Request
n8n-nodes-base.httpRequest - OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi
From the author
Learn how to build an MCP Server and Client in n8n with official nodes. > ⚠ Requires n8n version 1.88.0 or higher. In this example, we use Google Calendar and custom functions as two separate MCP Servers, demonstrating how to integrate both native and…