Code in n8n

n8n is a low-code tool. This means you can do a lot without code, then add code when needed.

JavaScript in your workflows

There are two places in your workflows where you can use code:

• Expressions

  Use expressions to transform data in your nodes. You can use JavaScript in expressions, as well as n8n's Built-in methods and variables and Data transformation functions.

  Expressions

• Code node

  The Code node allows you to add JavaScript to your workflow.

  Code node

Technical nodes

n8n provides core nodes, which simplify adding key functionality such as API requests, webhooks, scheduling, and file handling.

• Write a backend

  The HTTP Request, Webhook, and Code nodes help you make API calls, respond to webhooks, and write any JavaScript in your workflow.

  This allows you to do things like Create an API endpoint.

  Core nodes

• Represent complex logic

  You can build complex flows, using nodes like If, Switch, and Merge nodes.

  Flow logic

Other developer resources

• The n8n API

  n8n provides an API, allowing you to programmatically perform many of the same tasks as you can in the GUI. There's an n8n API node to access the API in your workflows.

  API

• Self-host

  You can self-host n8n. This keeps your data on your own infrastructure.

  Hosting

• Build your own nodes

  You can build custom nodes, install them on your n8n instance, and publish them to npm.

  Creating nodes