n8n

n8n runs automation workflows, with AI steps, that a team builds visually or in code. It runs on n8n Cloud or self-hosted, so every way in points at your own instance: {n8n_host} is its domain without https://, such as your-instance.app.n8n.cloud on n8n Cloud or the domain that serves your n8n editor when self-hosted.

The built-in MCP server is off until an instance owner or admin turns on Settings > Instance-level MCP. It signs in with OAuth, and an agent can run or change only the workflows enabled for MCP access. The n8n-cli CLI and the public REST API take an API key from Settings > n8n API, sent in the X-N8N-API-KEY header; the CLI reads the instance URL from N8N_URL. The API isn't available during the free trial.