# Action node

A node that does one thing in an app: send a Slack message, create a Jira issue, insert a DB row.

AI developers · Part 08: n8n · Card 3 of 13 · Last updated 2026-10-13

## 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.

## Related concepts

- [n8n](https://studyvisually.com/learn/tech/ai-developers/n8n/n8n)
- [Trigger node](https://studyvisually.com/learn/tech/ai-developers/n8n/trigger-node)
- [$json](https://studyvisually.com/learn/tech/ai-developers/n8n/json-item)
- [Code node](https://studyvisually.com/learn/tech/ai-developers/n8n/code-node)

Web page: https://studyvisually.com/learn/tech/ai-developers/n8n/action-node
Study this card in the app: https://studyvisually.com/app/learn?category=ai-developers&card=action-node