Part 08 · n8n · Card 3 of 13
Action node
A node that does one thing in an app: send a Slack message, create a Jira issue, insert a DB row.
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Analogy
A prewritten SDK call with the OAuth dance already done for you.
In an agent
Action nodes become the agent's hands when you expose them as tools.
Questions people ask
What is an action node in n8n?
An action node does one thing in an app: send a Slack message, create a Jira issue, add a row to a database or update a spreadsheet. The login and API details are already handled. It is like a prewritten SDK call with the OAuth setup done for you.
How do n8n action nodes become an agent's tools?
Put an action node behind a Webhook trigger in its own small workflow. The webhook URL becomes the tool: your agent calls it with JSON arguments, and n8n runs the action. The agent only knows a URL and a schema; n8n handles the app's API and authentication.