Hello Everyone!
I’ve been seeing a lot of questions pop up lately about AI agents, multi-agent orchestration, and how to wire these things together inside n8n.
Most folks jump straight to webhooks, external APIs, or even separate event brokers.
But n8n actually gives you a really neat way to handle this internally using the MCP Trigger node and the MCP Client tool node.
Above is an ai agent with a mcp client tool, this client calls another MCP Trigger (server)
MCP (Model Context Protocol) inside n8n lets you create lightweight, event-driven workflows that can talk to each other over channels using SSE (Server-Sent Events)—without needing HTTP webhooks or direct API calls.
You can set up one or more MCP Trigger nodes in your workflows to act as your agent listeners, and then have other workflows—or even tools inside or outside of n8n—send messages to them using the MCP Client tool node.
This creates a really clean way to build agent-style systems where each workflow acts independently but can still send and receive events through MCP channels.
Above here is the MCP Trigger Node calling tools
And the cool part?
You’re not limited to workflows only.
You can easily connect AI agents, tools nodes, external systems, or even MCP-aware clients from other n8n setups directly to your MCP Trigger nodes.
This opens up a lot of creative ways to build massive, scalable multi-agent systems, all running inside (or across) n8n environments—without needing to spin up extra services or broker layers.
What I love about this pattern is how flexible and frictionless it is once you start thinking of workflows as agents, and MCP Trigger and MCP Client nodes as your internal comms bus.
You get agent-to-agent communication, tools integrations, AI agent orchestration—all over MCP channels, inside n8n.
It’s a really underused pattern that I think more people could benefit from when trying to build agent-first or event-driven architectures inside n8n.