n8n Workflow: Basic Webhook and Data Transformation

This n8n workflow demonstrates a fundamental setup for receiving data via a webhook, transforming it, and then performing an HTTP request. It serves as a starting point for building more complex integrations that involve external triggers and API calls.

What it does

This workflow performs the following steps:

1. Listens for a Webhook Trigger: It starts by waiting for an incoming HTTP request to a specific URL. This acts as the entry point for the workflow.
2. Edits Fields (Set Node): After receiving data, it uses a "Set" node (labeled "Edit Fields") to manipulate or add new fields to the incoming JSON data. This is where you can define or modify the structure of the data before further processing.
3. Executes Custom Code: A "Code" node is included, allowing for the execution of custom JavaScript logic. This provides flexibility for complex data transformations, validations, or any other programmatic operations.
4. Sends an HTTP Request: Finally, it makes an HTTP request to an external API or service. The data transformed in the previous steps can be used to construct the request body, headers, or URL parameters.

Prerequisites/Requirements

• n8n Instance: You need a running n8n instance (self-hosted or cloud) to import and execute this workflow.
• Webhook Sender: An external system or application capable of sending HTTP requests to the n8n webhook URL.
• Target API/Service: An endpoint for the "HTTP Request" node to send data to.

Setup/Usage

1. Import the Workflow:
   • In your n8n instance, go to "Workflows".
   • Click "New" or "Import from JSON".
   • Paste the provided JSON content into the import dialog.
2. Activate the Webhook:
   • Once imported, locate the "Webhook" node.
   • Copy the "Webhook URL" displayed in the node's configuration. This is the URL your external system will send data to.
   • Ensure the workflow is "Active" (toggle the switch in the top right corner).
3. Configure "Edit Fields" (Set Node):
   • Open the "Edit Fields" node.
   • Define the fields you want to add, modify, or remove from the incoming data.
4. Configure "Code" Node:
   • Open the "Code" node.
   • Write your custom JavaScript logic to process the data as needed. The input data from the previous node will be available.
5. Configure "HTTP Request" Node:
   • Open the "HTTP Request" node.
   • Set the URL, Method (e.g., POST, GET), Headers, and Body according to the requirements of the API you are interacting with. You can reference data from previous nodes using expressions (e.g., {{ $json.someField }}).
6. Test the Workflow:
   • Send a test HTTP request to the webhook URL you copied earlier.
   • Observe the execution in n8n to ensure data flows correctly and all nodes perform as expected.